Police believe the torso belongs to a man in his 60s and have informed his family about his death, but have not yet identified him publicly.

In a news conference, officers revealed the victim is believed to have known two men who are currently in custody. They are believed to have lived together.

Detective Superintendent Lewis Hughes said they were looking at four crime scenes in Salford and the Greater Manchester area.

The human remains discovered over the last two days were found at Salford's Blackleach Reservoir and Linnyshaw Colliery Wood.

Officers had already identified the two scenes before the remains were found and were "on route to the Colliery Wood" when a dog walker called to say they had found a package, said Det Supt Hughes.

Police officers found the other remains at the reservoir today while searching the area.

"We are very confident it is the same victim," Det Supt Hughes added.

Police are searching a warehouse in Bury where "items were stored after this incident without the knowledge of occupants of that warehouse," said Det Supt Hughes.

They are also searching a house in Winton where the victim "was believed to have lived with the two men in custody".

"We have found evidence that the victim is likely to have died there - most likely in late March," Det Supt Hughes said.

The first remains - consisting of the bottom of the back, buttocks and thigh - were found in clear plastic by a passer-by at Kersal Dale Wetlands in Salford, Greater Manchester, on 4 April.

Two men, aged 42 and 68, from Salford, who are believed to be known to each other, were arrested on suspicion of murder on 25 April, GMP said, after officers trawled through hundreds of hours of CCTV footage.

The 42-year-old was arrested after officers stormed a bus in Eccles Old Road around midday, the force said.

The other man was later arrested at an address in Worsley Road.

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A 20-year-old man previously arrested on suspicion of murder was later released on bail pending further inquiries.

"It is too soon to rule out [looking for other suspects] but we're confident at this time that we have the right two suspects in custody," said Det Supt Hughes.

Detectives are still appealing to the public for any information related to the crime and want to hear from witnesses, including dog walkers, who were in the area between 6am and 6pm on the day a passer-by made the original grim discovery.

More than 100 officers searched the Kersal Dale area for 12 days looking for evidence, working with an underwater search team and dogs before lifting the crime scene on 17 April.