Suicide bombers assaulted a Shiite mosque in southern Afghanistan that was packed with worshippers attending weekly Friday prayers, killing at least 37 people and wounding more than 70, according to a hospital official and an eyewitness.

The attack on the Imam Barga mosque came a week after a bombing claimed by a local Islamic State affiliate killed 46 people at a Shiite mosque in northern Afghanistan. Murtaza, an eye-witness who like many Afghans goes by one name, said four suicide bombers attacked the mosque.