Transcript for 3 US service members killed by Taliban car bomb
And now to the horrific scene for American troops, the deadliest attack on U.S. Forces thisafghanistan. It was a deadly bomb attack. Three Americans and a contractor were killed in a roadside explosion. The Taliban tonight is claiming responsibility, and with what we know right now, here's our foreign correspondent James Longman. Reporter: Tonight, the Americans were traveling in a convoy when a Taliban car bomb exploded outside bagram air base near kabul. Three U.S. Service members were killed. Three more wounded. And an American contractor also killed. It was the deadliest day for the U.S. In Afghanistan this year. In all, seven U.S. Service personnel have been killed in little more than three months. Specialist Joseph Collette and sergeant first class will Lindsay died from wounds sustained in an operation in the north just over two weeks ago. President trump has indicated he wants to bring many of the 14,000 American troops home, but the Pentagon says there is no timeline. It was just two months ago, David Muir was given exclusive access in Afghanistan to American special forces training to take on the Taliban. Targeting the Taliban, while at the same time, talking with them, hoping to broker a peace deal. The top U.S. Commander, general Scott Miller, with David. Do you think those political talks with the Taliban with a key part of any endgame here? Absolutely. That was just two months ago. James Longman with us tonight from London. And James, even with the Taliban behind this deadly attack on American troops, we know the U.S. Has been involved in those direct talks on a possible peace agreement. So, where do the talks stand now? Reporter: Well, David, they reached an agreement in draft last month. That was about American troop withdrawal and the Taliban's commitment to not protect terror groups. But we are a long way from a concrete plan for the future of Afghanistan. David? As we clearly saw there today. James Longman tonight, thank you.
This transcript has been automatically generated and may not be 100% accurate.