A team of UK police officers has arrived in Jamaica to help the inquiry into the death of Pakistan cricket coach Bob Woolmer.
Jamaican police say Mr Woolmer was strangled
The former England batsman was found dead in his hotel room two weeks ago. Police say he was strangled.
The UK officers will review the inquiry following a formal request from the Jamaican authorities.
The lead investigator into journalist Daniel Pearl's murder in Pakistan will also go to Jamaica to help police.
Three Scotland Yard detectives and a scenes-of-crime officer arrived on Monday night, Scotland Yard said in a statement.
"This is normal practice for a review to take place a short time after the commencement of an investigation. In the UK, we actively encourage that investigations of this nature are reviewed periodically, and throughout the investigation," it said.
"The Jamaican Constabulary Force remains the primary investigating force."
Pakistan is also sending senior police investigator Mir Zubair Mahmood, who, along with another security official, is expected to leave for Jamaica on Wednesday, Pakistan Cricket Board chairman Naseem Ashraf told the AFP news agency.
Mr Mahmood said there had been no contact with the Jamaican police so far and that his official status would be that of an observer.
"We are going with the brief of extending all possible help and co-operation in the investigation," Mr Mahmood told the BBC.
Mr Mahmood led the investigation in the murder of US reporter Daniel Pearl, who was kidnapped in the city of Karachi in 2002 and was later shown being decapitated on a video sent to the US authorities.
A memorial service is to be held on Wednesday in Cape Town in South Africa, a country Woolmer had also coached, and where he lived with his family.
Another memorial service for Mr Woolmer was held in Pakistan on Sunday.
Pakistan's cricketers, including captain Inzamam-ul-Haq, attended the hour-long service at the Sacred Heart Cathedral in the city of Lahore.
Woolmer, 58, had been Pakistan coach since 2004.
He was found dead in his Kingston hotel room on 18 March, the day after the side lost to Ireland and were effectively knocked out of the Cricket World Cup.