BRNO, Czech Republic (AP) — An American man is suspected of killing a family of four and is on the run in the Czech Republic and likely armed, officials said Thursday. The bodies of the four victims — identified by neighbors as a married couple and their two sons — were found by firefighters who came tackle a fire in a house in Brno, the country's second-largest city. Firefighters spokesman Jaroslav Mikoska said rescuers immediately realized that "a violent crime had likely been committed there." The fire did not badly damage the house. Brno Police spokeswoman Petra Vedrova identified the suspect as Kevin Dahlgren, born in 1992, and released his photograph. A Facebook page showing the same photograph says that Dahlgren is from Palo Alto, California, and lives in Brno. Vedrova said that all four victims were related. A Czech public television reported that Dahlgren was the nephew of the parents. Police did not immediately confirm that relationship. A local band, Ukulele Orchestra jako Brno, confirmed to The Associated Press that two of its members were among the victims, but declined to comment further. Dahlgren's Facebook page contained a link to the band. Vedrova and neighbors said Dahlgren had only been in Brno for a few weeks. "As far as we know he came for a visit," neighbor Ivana Pohankova told the AP. "Such a tragedy, they were so young," Pohankova said. She said one son was 24 and the other was a teenager under 18. "We didn't hear anything but a neighbor came to say there was a smoke coming from the house. That's how they discovered it." Police asked the public for help finding Dahlgren, but warned that he might be dangerous and likely has a gun. They did not immediately release any other details about the suspect or about the killings. Another neighbor told the Czech public broadcaster he met Dahlgren two days ago and he invited him for a beer. "He looked absolutely fine and kept smiling," Jan Fiala said. "He said he didn't like the western world, that life in America is too fast while people here are more placid." Brno is located 200 kilometers (125 miles) southeast of Prague. Police say they cooperated with international law enforcement agencies to confirm the suspect's identity. ___ Janicek reported from Prague.

WASHINGTON (AP) — President Barack Obama is set to at least partially bring out into the open some of the U.S.-directed drone program, a key component of counterterrorism strategy, as he outlines the contours of the continuing threat to American security. On the eve of the president's speech at the National Defense University, the Obama administration revealed for the first time that a fourth American citizen had been killed in secretive drone strikes abroad. The killings of three other Americans in counterterror operations since 2009 were widely known before a letter from Attorney General Eric Holder to Senate Judiciary Committee Chairman Patrick Leahy acknowledged the four deaths. The afternoon speech Thursday also is expected to reaffirm his 2008 campaign promise to close the military prison at Guantanamo Bay, where terror suspects have been held. The speech will announce the resumption of transfers from the prison to other countries. The White House said Wednesday that Obama's speech coincides with the signing of new "presidential policy guidance" on when the U.S. can use drone strikes. Drafts of the guidance reviewed by counterterrorism officials gave control of drone strikes outside Pakistan and Yemen to the U.S. military, enshrining into policy what is already common practice, according to two U.S. officials briefed on the proposed changes. They spoke on condition of anonymity because they were not authorized to discuss the changes publicly. Chief among the speech's topics, officials said, is the administration's expanded use of unmanned spy drones to kill hundreds of people in Pakistan, Yemen and other places where terrorists have taken refuge. Obama has pledged to be more open with the public about the scope of the drone strikes. But a growing number of lawmakers in Congress are seeking to limit U.S. authorities that support the deadly drone strikes, which have targeted a wider range of threats than initially anticipated. The president is expected to talk generally about the need for greater transparency in the drone strikes and may allude to the desire to give greater responsibility for those operations to the military. But he is likely to tread carefully on an issue that involves classified CIA operations. The speech comes amid growing impatience in Congress with the sweeping authority it gave the president after the Sept. 11, 2001, terrorist attacks in light of the targeting of suspected terrorists with lethal drone strikes. Republicans and Democrats fear that they have given the president a blank check for using military force worldwide. Shifting the responsibility of some of the drone program from the CIA to the military has given Congress greater oversight of the secretive program and members say they want even more. Under the draft guidance, the CIA drone program would remain up and running, to target al-Qaida in Pakistan's tribal areas, with U.S. troops drawing down in Afghanistan and concern rising that al-Qaida might return in greater numbers to the region. The military and the CIA currently work side by side in Yemen, with the CIA flying its drones over the northern region out of a covert base in Saudi Arabia, and the military flying its unmanned aerial vehicles from Djibouti. Obama "believes that we need to be as transparent about a matter like this as we can, understanding that there are national security implications to this issue and to the broader issues involved in counterterrorism policy," White House spokesman Jay Carney told reporters Wednesday. "He thinks (this) is an absolutely valid and legitimate and important area of discussion and debate and conversation, and that it is his belief that there need to be structures in place that remain in place for successive administrations," Carney said. "So that in the carrying out of counterterrorism policy, procedures are followed that allow it to be conducted in a way that ensures that we're keeping with our traditions and our laws." In a letter Wednesday to congressional leaders, Holder said only one of the U.S. citizens killed in counterterror operations beyond war zones — Anwar al-Awlaki, who had ties to at least three attacks planned or carried out on U.S. soil — was specifically targeted by American forces. He said the other three Americans were not targeted in the U.S. strikes. The deaths of three of the four, including al-Awlaki's 16-year-old son, Abdulrahman, were already known. Holder's letter revealed the killing of Jude Kenan Mohammad, who was indicted by federal authorities in 2009 as part of an alleged homegrown terror plot to attack the U.S. Marine Corps base at Quantico, Va. Before he could be arrested, authorities said, Mohammad fled the country to join jihadi fighters in the tribal areas of Pakistan. The strike that killed Anwar al-Awlaki was actually carried out by the military, using borrowed CIA drones. .For months Congress has urged Obama to release a classified Justice Department legal opinion justifying when U.S. counterterror missions, including drone strikes, can be used to kill American citizens abroad. Holder's letter said lethal force will be used only against targets who pose "a continuing, imminent threat to Americans" and cannot feasibly be captured. Several lawmakers declined immediate comment Wednesday on Holder's letter or Obama's speech. Human rights watchdogs, however, were not immediately appeased. Human Rights First legal director Dixon Osburn welcomed the White House's pledge for more transparency but remained "deeply concerned that the administration appears to be institutionalizing a problematic targeted killing policy without public debate on whether the rules are lawful or appropriate." "The American public deserves to know whether the administration is complying with the law, and Congress should debate the legal and policy implications of our targeted killing operations," Osburn said in a statement. In re-affirming his pledge to close the detention center at Guantanamo, Obama will push in the speech for a renewed effort to transfer its 166 detainees to other countries. Congress and the White House have sparred since Obama took office in 2009 over the fate of the suspects and whether they can be brought to trial on U.S. soil. In the meantime, the detainees have been held for years with diminishing hope that they will charged with a crime or be given a trial. An aide to House Armed Services Committee Chairman Howard P. "Buck" McKeon, R-Calif., said lawmakers remain concerned that detainees who are released would rejoin the terror fight. The staff member was not authorized to discuss the issue on the record and spoke on condition of anonymity. This week, the Pentagon asked Congress for more than $450 million for maintaining and upgrading the Guantanamo prison. More than 100 of the prisoners have launched a hunger strike to protest their indefinite detention, and the military earlier this month was force-feeding 30 of them to keep them from starving to death. Obama was expected to make the case that the U.S.-led war in Afghanistan has decimated al-Qaida's core, even as new threats emerge elsewhere. Against the backdrop of last month's deadly double-bombing at the Boston Marathon, administration officials said Obama will highlight the persistent threat of homegrown terrorists — militants or extremists who are either American citizens or have lived in the U.S. for years. The two Chechen-born suspects in the Boston attacks were raised in the United States and turned against America and its invasions of Iraq and Afghanistan only in recent years, investigators have said. Obama will try to refocus an increasingly apathetic public on security issues as his administration grapples with a series of unrelated controversies stemming from the attack on a U.S. compound in Benghazi, Libya, the IRS' targeting of conservative groups and government monitoring of reporters. Critics say his national security policies have given foreign allies mixed signals about U.S. intentions in some of the world's most volatiles areas. Like the quandaries of drone strikes and Guantanamo, the rise of homegrown terrorism is nothing new. The Obama administration included homegrown threats in its National Security Strategy in 2010. However, such threats have increased as the power of al-Qaida's central leadership has ebbed — especially after Osama bin Laden was killed in his Pakistani hideout by U.S. special forces two years ago. ___ Associated Press writers Julie Pace and Kimberly Dozier contributed to this report. Follow Lara Jakes at https://twitter.com/larajakesAP and Lolita C. Baldor on Twitter at https://twitter.com/lbaldor