A 15-year-old boy has been arrested for looting after his mother handed him in to police as the hunt goes on for more suspects.
The woman saw pictures of rioters trying to prise open the shutters of a shop in Salford as the shopping precinct was being looted on Tuesday evening.
She recognised her son as one of the looters and took him to the local police station.
He is now under arrest on suspicion of burglary.
The boy is one of more than 200 people arrested across Manchester, Salford and Liverpool during the rioting earlier this week.
Garry Shewan, assistant chief constable of Greater Manchester Police (GMP), said: "The parent saw the picture of her son and was absolutely appalled, horrified and angry.
"What she did is extremely admirable and I thank her for handing him in to local officers as it must have been a hard thing to do.
"I would urge members of the community who were left angered by the events of Tuesday night and believe they know of those involved to contact police as soon as possible."
Police in Manchester have now made 176 arrests following the rioting in the city and in neighbouring Salford on Tuesday night.
They made 37 arrests yesterday. Some suspects were held in raids after looters were identified from CCTV and other images taken during the trouble.
Looted goods including stolen jeans, watches, camera equipment and other property have been recovered.
There was a "significant" police presence on the streets of Greater Manchester last night and no incidents of disorder were reported.
It was also quiet in Liverpool, where riots erupted over two nights in the south of the city.
Merseyside Police have made around 50 arrests to date and released more CCTV stills today of suspects they want to trace. They have set up a dedicated email address for anyone wanting to share information about those involved or to submit their own images or footage of the disorder.
Andy Ward, assistant chief constable of Merseyside Police, said: "The public have an important part to play and I would urge everyone to look at the images in the media and tell us who these offenders are and where we can find them so they can be brought to justice."
Anyone with information about the trouble in Liverpool, or images of those involved, are asked to call 0151 709 6010 or email photos to disorderinvestigationmerseyside.police.uk.