Karachi, Pakistan's main economic and industrial hub and at 23.5 million people one of the largest cities of the planet, is in a state of chaos tonight after the arrest of a key politician in London.
Muttahida Qaumi Movement (MQM) leader Altaf Hussain has been living in exile in London since the early 1990s, though he has also occasionally gone back for speeches. He effectively runs Karachi, as well as much of the Sindh Province, out of an office in northern London. He was arrested in his home and faces charges related to money laundering.
The announcement of his arrest sparked a major panic across the city. Shops were closed anticipating riots, gunmen fired into the air across the city, and MQM protesters took to the streets. At least five have been confirmed killed in preliminary violence.