The widow of a murdered Pakistani politician has collapsed with emotion as she appealed for help to catch his killer.

Dr Imran Farooq, 50, died from stab wounds and head injuries after he was attacked outside his home in Edgware, north London, last Thursday.

Police fear the killing could be politically motivated as he was a prominent member of a liberal, mainstream Pakiststani party.

His widow Shumaila Imran, 42, said the death of the "dedicated family man" had left her and others in "shock and disbelief".

Speaking at New Scotland Yard, she said "someone, somewhere" holds important information about the murder.

Choked with tears, she added: "I want to make my own personal appeal for help in catching the people who killed my husband Dr Imran Farooq.

"Dr Imran Farooq was a dedicated family man, a loving father and a loving husband. His murder a week ago has devastated me and left our family in a state of shock and disbelief. My husband was on his way home from work when he was set upon and attacked. I want to appeal today for anyone who has any information about the attack on Imran to come forward and tell the police what they know. Someone, somewhere knows something about my husband's murder."