The death toll from a deadly blast at a mosque in southern Pakistan has risen to 49.

Hadi Bakhsh Zardari, the deputy commissioner of Shikarpur district - where the blast hit, gave the death toll and said 31 wounded are still in area hospitals.

The blast targeted a mosque belonging to members of Pakistan's minority Shiite community. It exploded during Friday prayers when the mosque was packed with worshippers.

The Sunni militant group Jundullah claimed responsibility for the attack.

Shikarpur in Sindh province is roughly 310 miles north of the port city of Karachi.