"The official report from the pathologist states that Mr. Woolmer's death was due to asphyxia as a result of manual strangulation. In these circumstances, the matter of Mr. Woolmer's death is now being treated by the Jamaican police as murder," Police Commissioner Lucius Thomas said in a statement that was read by a police spokesman at the Jamaica Pegasus Hotel — where Woolmer was killed on Sunday.
"There is an ongoing murder investigation into the death of Robert Woolmer and as a result the security arrangements at the Jamaica Pegasus Hotel are a part of those investigations," Ellington said in a statement also read by a police spokesman. He declined to elaborate.
Pakistan cricketers were finger printed and interviewed on Thursday by police investigating the death of Woolmer after a shocking World Cup loss to Ireland on the weekend. The team later left for the northern resort of Montego Bay, from where they were scheduled to fly home on Saturday.
No arrests have been made and there are no suspects in the case.
"It is our belief that those associated with or having access with Mr. Woolmer may have vital information to assist this inquiry," Thomas said.
It was not clear if the team would be asked to remain in Jamaica pending the investigation, but Mark Shields, a deputy police commissioner at the press conference, said the players have pledged full cooperation whether they are in the Caribbean island or back home in Pakistan.
Lord Paul Congdon, head of the International Cricket Council's anti-corruption unit, will investigate if corruption played a role in Woolmer's death, ICC chief executive Malcolm Speed said.
Former Pakistani player Sarfraz Nawaz on Tuesday said that he believed Woolmer was killed by gambling interests, although he had no proof.
The Jamaican police have also been in contact with the ICC anti-corruption unit, said police spokesman Karl Angell.
Earlier Thursday, Assistant Police Commissioner Les Green, formerly of Scotland Yard, said the team was fingerprinted as part of standard procedure "to eliminate persons from fingerprints which would be found in the room."
"After a thorough investigation, fingerprints not belonging to Mr. Woolmer were found in the room," he told The Associated Press.