One of the most divisive and feared figures in Pakistan was arrested in London yesterday, sparking fears of a violent backlash in Pakistan and sending the country’s biggest city of Karachi into lockdown.

Altaf Hussain, leader of the powerful Muttahida Qaumi Movement (MQM) and wanted in Pakistan in relation to a murder case, was arrested in northwest London where he has lived in self-imposed exile since the early 1990s.

Police said a 60-year-old man was arrested on suspicion of money-laundering during a morning raid but declined to confirm his identity. A spokesman said the man was escorted to a pre-arranged hospital appointment during the day and remained in custody late yesterday.

Altaf Hussain is wanted in Pakistan in relation to a murder case

A spokesman for the MQM headquarters in London confirmed that Hussain was arrested at his home in the morning as part of an ongoing investigation and said he was happy to help police with their inquiries.

“While these inquiries are taking place, the party leadership calls for calm from our millions of party members and supporters in Pakistan and across the world,” spokesman Nadeem Nusrat said in a statement.

“The party is prepared to assist the British police with all of their enquiries as neither Mr Altaf Hussain nor the party have anything to hide.”

Hussain is known for his fiery addresses to his supporters in Karachi through a loudspeaker connected to a telephone.

He effectively controls the sometimes violent port city of Karachi from his headquarters in a north London suburb.

The MQM party’s support base is millions of Muslim Urdu-speaking people whose families migrated to Karachi and nearby areas at the time of the 1947 partition of India.

Hussain’s hold on Karachi is so strong that he is capable of shutting down entire neighbourhoods of the city of 18 million.

Within minutes of his arrest, panicked shopkeepers and market stall owners rushed to close their businesses for fear of violence, residents said.

“We deployed extra security at the British High Commission in the southern part of Karachi as soon we learnt about Altaf Hussain’s arrest in London through media,” Deputy Inspector General Abdul Khalique Shaikh said.

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