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Greater Manchester Police has arrested eight people as part of the investigation into the August disorder.
Operation Valant was launched by Greater Manchester Police to identify and arrest those involved in the widespread disorder across Manchester city centre and Salford on 9 August 2011.
Following a series of raids in Salford, north Manchester and Stockport, eight people wanted on suspicion of a number of offences, including violent disorder and multiple burglaries, have been arrested and remain in police custody for questioning.
It brings the total number of arrests since the investigation began to 380, more than 200 of which have been put before the courts.
Assistant Chief Constable Dawn Copley said: "Since the disorder four months ago, a dedicated team of officers have worked tirelessly to identify as many of those involved as possible, trawling hours of CCTV footage and using forensic technology to identify suspects.
"What today's action demonstrates is that we will continue to take action against those who took part in the shameful scenes we saw that day.
"I would again like to take this opportunity to thank the public for their fantastic support and for coming forward with information that has enabled Greater Manchester Police to make hundreds of arrests and show our communities that those involved in the disorder will be brought to justice."
Anyone with information should call police on 101 or the independent charity Crimestoppers, anonymously, on 0800 555 111.