LONDON, Sept 16: Investigating the murder of Muttahida Qaumi Movement (MQM) leader Imran Farooq, the London police have said that the slain politician`s wish to launch a new political party before his death remains a key line of probe.

In a statement published on the Metropolitan Police website on Mr Farooq`s third death anniversary on Monday, the police announced a reward of up to £20,000 for anyone providing information leading to the identification, arrest and prosecution of those responsible for the murder.

On Sept 16, 2010, 50-yearold Farooq was on his way home from work when he wasattacked in Green Lane, outside his London home. The post-mortem examination revealed that he died from multiple stab wounds.

MQM chief Altaf Hussain was also interrogated by the London Police over the murder as well as suspicions of money laundering.

The police, in the latest statement, said their detectives from the Met Police Counter-Terrorism Command were committed to finding those responsible for the crime.

`To date they have spoken to 4,076 people, reviewed 6,350 documents and followed up 2,114 lines of inquiry in order to bring his killers to justice,` the statement said.