Bomb blast kills top Pakistan Police chief

A senior police officer, known in Pakistan for campaigning against the Taliban, has been killed in a bomb blast in Karachi.
Chaudhry Aslam Khan, the head of the city’s anti-terror operations, and three others died in an attack
on a police convoy in the Essa Nagri area of the city, reports say.
The Pakistan Taliban have claimed responsibility for the attack.
Mr Khan has survived a number of previous attempts on his life