KABUL (AP) ― Two suicide bombers targeted worshippers on a key Muslim festival in northern Afghanistan, killing seven, including two local police commanders, officials said Sunday.

The bombers struck as Muslims were leaving a mosque on the outskirts of Old Baghlan City after prayers at the start of the Eid al-Adha, the Feast of the Sacrifice.

At least 18 other people were taken to hospitals with injuries from the attack in Hassin Tal, about 10 kilometers east of the city. One bomber blew himself up and the second was captured before he could set off his explosives, said Lal Mohammad Ahmadzai, spokesman for the regional police commander in the north.

The bombings raise questions about Afghan forces’ ability to tackle the insurgency head-on without their NATO partners. NATO is working to handing over full security responsibilities to Afghan forces before the end of 2014, when the coalition plans to withdraw its combat troops.