LYON (euronews) — US President Donald Trump said he was cancelling peace talks with Taliban leaders and the President of Afghanistan after a car bombing in Kabul killed one U.S. service member and 11 others. The Taliban claimed the car bombing in Kabul.

The American president said that the leaders were supposed to come to Camp David — the retreat of American presidents — for talks on Sunday. The administration was working on a peace settlement to end a war that has been going on for nearly 18 years.

Trump tweeted:

If they [the Taliban] cannot agree to a ceasefire during these very important peace talks, and would even kill 12 innocent people, then they probably don’t have the power to negotiate a meaningful agreement anyway.

The agreement followed nine rounds of U.S. negotiations with the Taliban.

There are roughly 14,000 troops remaining in the country and more than 2,400 U.S. troops have been killed since the U.S. invaded the country after the terrorist attacks of September 11, 2001.