"The US strongly condemns the terrorist attack today at the Baqir-ul-Olum Mosque in Kabul, Afghanistan, which killed dozens of innocent civilians, many of them worshipers, and wounded more than 40," said Ned Price, spokesman of the National Security Council at the White House.
This cowardly attack was clearly intended to stoke sectarian tensions in Afghanistan, he said.
"We extend our deepest condolences to the families and friends of the victims of this attack and fully support efforts to bring those responsible to justice," he added.