Police are of the opinion that before being fatally stabbed in the nearby street, Singh managed to grabbed one of the suspects.
According to the Metropolitan Police spokesman, in-charge of London and its suburbs, the murder involved more than two suspects.
Sukhwinder's murder has led to a debate in Britain over the extend of public intervention in stopping criminal activities.
31-year Sukhwinder, hailing from Ludhiana, was stabbed in the heart when he chased two men who tried to run away with the bag of 28-year-old woman in Barking, east London, Friday, Jan 8.
Sukhwinder's wife, parents and son reside in a village in Ludhiana district.