UPDATE 3-Dutch pull Pfizer vaccine batch after infants die

* 3 deaths in October after Prevenar vaccination

* Cause of deaths to be determined-Dutch health authority

* Suspended batch contains 110,000 doses (Adds details on vaccine)

AMSTERDAM, Nov 5 (Reuters) - Dutch authorities say they have banned use of a batch of Pfizer Inc's (PFE.N) Prevenar, or Prevnar, after three infants died within two weeks of receiving the anti-infection vaccination.

"On average about 5 to 10 deaths are reported annually after babies get vaccines," said a spokeswoman for the Dutch health institute RIVM.

"We now have three cases in a short period; that is unusual, and the reason for suspending the batch."

She said RIVM is investigating the cause of the infants' deaths. Other batches of Prevenar, known as Prevnar in the United States, will continue to be used.

Pfizer spokeswoman Gwen Fisher said preliminary investigations by the company and health authorities had found no link between the vaccinations and the deaths.

She said the company initiated the "quarantine" of the batch, which she said contained 110,000 doses of Prevenar, used to prevent pneumonia and related infections.