Seven people were killed and more than two dozen were injured Sunday when a suicide bomber attacked a church packed with more than 400 worshippers during a service in Pakistan, CNN reported.

A Methodist church in Quetta was targeted by two attackers, but only one was able to denonate his vest, according to Sarfaraz Bugti, the interior minister of the Balochistan province. The second attacker was shot by a church security guard before he could detonate his explosives, Bugti said.

The civilians were killed during the blast and in the intense firefight that followed, according to Moazzam Jah Ansari, the provincial police chief.