A murder investigation has been launched by detectives in Hull after the bodies of two men were found in a back garden, Humberside Police said.
The men have been identified as 52-year-old Daniel Hatfield and 49-year-old Matthew Higgins, both from Hull.
The deaths were initially treated as "suspicious" when the discovery was made in May Street, Hull, shortly after 6pm on Friday, following a call from a neighbour who reported seeing a leg sticking out from beneath a duvet.
But the force today confirmed it now considered it a murder case, after a post mortem examination revealed the two men had suffered "significant multiple injuries".
Det Supt Matt Hutchinson, from the Major Crime Unit, appealed for anyone who had any information about the men's whereabouts between Monday, April 18, and Friday, April 22, to come forward.
Detectives also want to speak to anyone who has spotted people arriving at or leaving the property, number 7 May Street, in the week leading up to the men being discovered.
House-to-house inquiries were still being carried out, DS Hutchinson added, as officers continued to trawl CCTV and conduct forensic examinations at the scene.
Three people - including two women, aged 27 and 36, and a 38-year-old man - have been arrested in connection with the investigation and remained in custody on Sunday afternoon.
Anyone with any information about the victims is urged to call 101 quoting log 482 of 22/04/16 or Crimestoppers anonymously on 0800 555111.