Pakistan cricket coach Bob Woolmer [Images] almost certainly died of heart failure, Jamaica police said on Wednesday, a day after ending a high-profile murder investigation into his March death.

In an embarrassing U-turn, police said on Tuesday that the 58-year-old former England [Images] international cricketer died of natural causes, in direct contradiction to a post-mortem report that said he had been strangled.

• Bob Woolmer's death story

Police based their conclusion on the cause of Woolmer's death on the evidence of three independent pathologists from Britain, Canada [Images] and South Africa who reviewed the initial post-mortem and said Woolmer was not murdered.

They also took into account a toxicologist's report which said there were no poisons in Woolmer's body.

"Determining the cause of death is the remit of the coroner but we are 99 percent sure that Woolmer died of heart failure," said police spokesman Karl Angell.

He did not elaborate, but the Jamaica Observer newspaper quoted Police Commissioner Lucius Thomas as saying Woolmer had "an enlarged heart which was brought on by a number of illnesses."

Previous media reports have referred to his ill health and speculated that he suffered from diabetes.

Woolmer's death in Kingston [Images] on March 18, one day after Pakistan lost to little-fancied Ireland in the cricket World Cup, cast a shadow over the sport that deepened when police announced they were launching a murder investigation.

That probe was based upon a post-mortem report by pathologist Ere Seshaiah, who said he found signs that the cricket coach had been asphyxiated through manual strangulation. Seshaiah insisted he was right despite the finding reached by police in the Caribbean island nation.

"I am sticking to my findings. He was murdered," he told the Observer in an interview published on Wednesday.

The Gleaner newspaper published excerpts from the three reports by the independent coroners used by police.

"After viewing the photographs and video and discussing the circumstances, I gave my opinion that Mr. Woolmer's death was not due to throttling, but in fact natural causes, probably cardiac related," Lorna Martin, head of forensic medicine and toxicology at the University of Cape Town, South Africa, was quoted as saying.

Kingston's coroner has declined to say when an announcement on the official cause of death will be made.

National Security Minister Peter Phillips announced in parliament on Wednesday the government will set up a commission to review the investigation into Woolmer's death.

The commission will assess the "appropriateness of the techniques and the standards of professionalism employed by the police investigators as well as the medical and other professional personnel," Phillips said.

He said the commission would complete its work within six weeks with a report due by July 31.

Woolmer's death and the subsequent murder investigation was was a black eye for the tourism-dependent Caribbean nation already plagued by one of the world's highest murder rates.