Police in Pakistan say they have detained 250 members of the hardline Sunni Muslim group, Sipah-e-Sahaba.

BBC: Pakistan detains hardline Sunnis

Punjab's minister of law, Rana Sanaullah, went on the campaign trail in February with the reputed head of Sipah-e-Sahaba, for a by-election in the southern town of Jhang.

ECONOMIST: The Punjabi Taliban