Pakistan mosque blast 'kills 20'

At least 20 people have been killed after a suicide bomber detonated a device at the entrance to a Shia mosque in north-east Pakistan, police say.

Dozens of others were injured in the blast south of the capital, Islamabad.

A religious congregation attended by upwards of 1,000 people was taking place at the mosque in the Chakwal area of Punjab province.

A day earlier eight paramilitary soldiers were killed in a suicide attack on an Islamabad security base.