Iftikhar Hussain, a 52-year old suspect in the murder of former Muttahida Qaumi Movement (MQM) leader Dr Imran Farooq was released on Tuesday by the police in London.
Hussain, who is purportedly a close relative of MQM chief Altaf Hussain, was released as no evidence was found against him, said a statement. However, British authorities were reportedly in contact with their Pakistani counterparts for collection of evidence in the murder case.
The London Met police arrested Iftikhar Hussain from Heathrow Airport upon his arrival from Canada in June earlier this year.
MQM leader Dr Imran Farooq, aged 50, was on his way home from work when he was attacked in Green Lane on Sept 16, 2010 outside his London home. A post-mortem examination found that he died from multiple stab wounds and blunt trauma to the head.
The arrest made by the police in June was the most significant progress in the case in more than a year.