News:Detectives investigating the murder of Pakistan's cricket coach, Bob Woolmer, say they are actively pursuing the possibility that match-fixing of one or more of the World Cup games may have provided the motive for his killing.

They confirmed last night that they are collaborating with a senior official from the International Cricket Council's anti-corruption unit to investigate speculation that Woolmer may have been intending to expose foul play.

They are also investigating rumours that the coach was involved in a dispute with some of his players on their return from Saturday's Ireland game and said they would be interviewing security personnel who had been on the team bus. Earlier, it had emerged that the entire Pakistan team has been swabbed for DNA samples yesterday amid rising concerns that the team was being singled out for police attention.

As the hunt for Woolmer's killer continued, a specialist forensic unit arrived by helicopter at the Jamaica hotel where the Pakistan team is staying, to conduct hours of tests. Senior police officers have emphasised that the testing was routine and would be applied to all potential witnesses.

Detectives said last night that they were analysing the records of Woolmer's key card entry to his hotel room and a similar card-swipe device in the hotel lifts. They are exploring the possibility that his killer may have been let into Woolmer's room by the coach himself, or may have had their own card to the room, or a master card. Investigators are also awaiting toxicology reports that would indicate whether the coach had been drugged.

The head of the International Cricket Council's anti-corruption unit will investigate if match-fixing had played a role in Woolmer's death, ICC chief executive Malcolm Speed said.

Sri Lanka beat India by 69 runs their Group B in Trinidad.