The United States launched a bomb containing more than eight tons of high-powered explosives on Afghanistan.
Dozens also wounded at Sardar Daud Khan hospital in central Kabul after disguised gunmen launch assault.
Gunmen dressed in white lab coats stormed a hospital in the Afghan capital and battled security forces for hours, killing more than 30 people and wounding dozens.
Defence ministry officials said the attack started at 9am with a suicide bombing at the front gate of the Sardar Daud Khan hospital in the Wazir Akbar Khan area, central Kabul, on Wednesday.
It was the latest in a series of attacks against civilian and military targets in Afghanistan, and underlined the growing threat posed by anti-government fighters.