Footage of a "shocking, brutal and sustained attack" on an "innocent and defenceless" man at a tram stop in Oldham, Greater Manchester, has been released by police.

Police said the 49-year-old victim was repeatedly kicked and stamped on by up to three attackers, described as Asian males aged between 15 and 18, on 8 March in Chadderton.

They returned on three separate occasions to continue the "remorseless assault", police added.