Former Pakistan PM arrested, more than 100 die in bomb attacks on poll rallies

More than 100 dead in Pakistan after a suicide attack at a campaign rally. [Courtesy]

A suicide bomber has killed at least 128 people at a campaign rally in south-western Pakistan - the deadliest attack in the country since 2014.

A local candidate was among the dead in the Mastung town, police say. So-called Islamic State (IS) claimed the attack.