Karachi shut down after killing of Imran Farooq

Pakistan's largest city has come to a near standstill following the killing in London of an exiled leader of the powerful Muttahida Qaumi Movement.

Supporters of the party have gathered to mourn Imran Farooq, who was stabbed outside his home on Thursday afternoon.

A BBC correspondent in Karachi says the situation is tense but peaceful. Most shops and schools are closed.

Last month, more than 80 people were killed in clashes in the city after the killing of another MQM politician.

British police say no-one has yet been arrested over the stabbing of Mr Farooq, and it is not clear if it was politically motivated.

Raza Haroon, a member of the MQM central coordination committee, said: "He was a gentleman, a very, very soft spoken person with a lot of knowledge, and who was very outspoken as well.

"It's a very huge loss to the party to have lost a senior leader, in such a manner. This is an irreparable loss and a great tragedy for the MQM."