
The two suspects, according to the BBC, have aliases Mohsin Ali Syed and Mohammed Kashif Khan Kamran. The BBC further claimed that the two men are believed to be in Pakistani custody, but not under formal arrest.
The Pakistani government has denied any arrest has been made in connection with the murder case. Pakistani officials also failed to respond to questions about the request from the UK's Crown Prosecution Service.
The BBC claimed that the suspects are believed to have traveled to the UK pretending to be students.
Earlier, the London Metropolitan had arrested Iftikhar Hussain, 52, at Heathrow airport upon his arrival from Canada on June 24, but he was later released on bail. He is said to be a close relative of the Muttahida Qaumi Movement chief Altaf Hussain.
Farooq, 50, was a former leader of MQM and had lived in London in self-imposed exile from 1999.
He was on his way back from work when he was attacked outside his home in Edgware, north London, in September 2010.
A post-mortem gave the cause of death as multiple stab wounds and blunt trauma to the head. A kitchen knife and a house brick used in the attack were recovered at the scene.
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