BOLDUAN: New details of an ambush that left three U.S. Special Forces soldiers dead and two others wounded. This happened in the African country of Niger. The troops were on patrol with local forces when the attack happened. CNN's Pentagon correspondent, Barbara Starr, has much more on this. Barbara, what are you learning?</s>BARBARA STARR, PENTAGON CORRESPONDENT: Good morning, Kate. A significant and ongoing military operation at this hour. Three United States Green Berets killed in action and two were wounded several hours ago in this. When they came under attack, they were on a mission with local Nigerian forces in West Africa. What we know now is that French forces in the region are conducting operations on the border looking for the attackers. It was also French helicopters that moved in overnight and evacuated the American dead and wounded and provided covering fire at the location where they had come under attack. So now this very much turning into an international military operation in West Africa. What were the U.S. troops doing there? They partner up with the West African forces and try to help them in advising and assisting them in going after, whether it's al Qaeda or other ISIS elements in the region, trying to help them with the terrorism threat that these nations are facing in this very remote part of the world -- Kate?</s>BOLDUAN: Quickly, Barbara, do we know when they will be brought back?</s>STARR: What we know is they have been evacuated. The wounded are in the hospital in Germany where so many have been treated over the years from the frontline war zone. Those who are deceased are being returned to the United States. Family notification is under way -- Kate?</s>BOLDUAN: Barbara, thank you so much. Appreciate it.</s>BOLDUAN: Still ahead, Las Vegas fire officials and first responders are set to have a news conference any moment now on the Las Vegas shooting. We will bring it to you.
3 U.S. Green Berets Killed in Ambush.