U.S. President Donald Trump departs after presenting NBA Hall of Fame player Jerry West with the Presidential Medal of Freedom in the Oval office of the White House in Washington, U.S., September 5, 2019. REUTERS/Joshua Roberts

WASHINGTON (Reuters) - U.S. President Donald Trump on Saturday said he canceled peace talks with Afghanistan’s Taliban leaders after the insurgent group said it was behind an attack in Kabul that killed an American soldier and 11 other people.

“If they 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,” Trump said on Twitter, saying he had been planning to meet with Taliban leaders on Sunday.