Early reports on Sky Sports News state that Woolmer was found in his hotel room unconscious at 10.45am on Sunday morning.
Woolmer was staying in the Pegasus Hotel close to the Sabina Park ground where Pakistan were playing their group games.
After being found on the floor on his hotel room, with signs of vomiting, Woolmer was examined by doctors before being taken to University Hospital in Kingston.
"We have taken Bob Woolmer to the hospital and he is in the emergency ward. We don't know anything more at the moment," Pakistan team media manager Pervez Mir told AFP.
It is not yet known what caused Woolmer to be admitted to hospital, or what his condition currently is, but the signs are certainly worrying for the Pakistan coach.
The Pakistan team spokesman continued: "We saw him last night but having not seen him early today two of our officers went to his room and with the help of hotel staff entered.
"He was found unconscious there.
"It is too early to say whether he has suffered a heart attack. We are awaiting medical reports."
Woolmer, 58, had come in for intense criticism after Pakistan were dumped out of the World Cup following their shock defeat against Ireland.
The former England Test player's contract as Pakistan coach expires at the end of the tournament, and there were already major doubts about whether the former South Africa and Warwickshire coach would stay on with the PCB or not.
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