KABUL, Afghanistan (AP) — Militants stormed a packed Shiite mosque in the Afghan capital during Friday prayers, in an attack that lasted for hours and ended with at least 20 worshippers killed and another 50 seriously wounded, many of them children, an official said.

Two of the assailants blew themselves up and another two were shot to death by Afghan security forces, according to police official Mohammed Sadique Muradi.

The Islamic State group claimed responsibility for the attack, the latest to target Afghanistan's minority Shiites. The Taliban condemned the violence, with a spokesman for th...