"We are relieved that it has been officially announced that Bob died of natural causes," Gill Woolmer told AFP from her home in Pinelands, Cape Town, adopted by the English-born Woolmer as his hometown.

"It is now over".

She would not say whether the finding by the police, adding, surprised her: "I didn't expect anything. It was an official police investigation."

Jamaica Constabulary Force commissioner Lucius Thomas earlier Tuesday announced that foreign pathologists "concur with the view that Mr Woolmer died of natural causes" while in further toxicology tests, "no substance was found to indicate that Bob Woolmer was poisoned".

"The JCF accepts these findings and has now closed its investigation into the death of Mr Bob Woolmer," Thomas told a news conference.

Woolmer, 58, died soon after being found unconscious in his hotel room in Jamaica on March 18, the day after Pakistan was knocked out of the cricket World Cup by the minnows Ireland.

An initial autopsy report proved inconclusive, but a pathology report later indicated the former South African coach died of asphyxia as a result of "manual strangulation," which led the police to treat the death as murder.

The claims rocked the world of cricket amid speculation about links to an alleged gambling mafia, claims for which Thomas said were without foundation.

"The Jamaica Constabulary Force adopted a thoroughly professional investigation where nothing was left to chance. Every effort has been made by the Jamaica Constabulary Force to seek the truth surrounding Bob Woolmer's death," he said.

"My hope is that despite the trauma of the last two and half months, Mrs Woolmer and her sons will be confident that the JCF has done all it can to establish the truth surrounding the death of her husband."

Woolmer, a former England Test batsman who made his home in South Africa, was cremated at a private family ceremony in Cape Town on May 4.