Shia mosque targeted in Pakistan bomb blast

At least 40 people have been killed in a bomb blast at a Shia mosque in southern Pakistan, officials have said.

Dozens were wounded in the attack after Friday prayers in Shikarpur district of Sindh province, and the death toll is expected to rise.

Sunni militants linked to the Pakistani Taliban said they carried out the attack.

Shahzeb Jillani reports from Karachi.