A suicide bomber attacked an armored bus on Saturday in Kabul, Afghanistan, killing at least 12 Americans, reported the New York Times.
According to NATO officials, five troops and eight civilian contractors were killed in the attack, reported the L.A. Times.
The L.A. Times notes it is the "single deadliest attack on U.S. citizens in the Afghan capital since the war began a decade ago."
A Canadian soldier and four Afghans were also killed, reported the New York Times.
American officials view the attack as "the Taliban's attempt to shake confidence in the Afghan government," according to the New York Times.