KHOST, Afghanistan - A suicide bomber blew himself up in a U.S. military base in Afghanistan on Wednesday, killing two NATO service members.

The Taliban claimed responsibility for the attack.

The suicide bomber, dressed as an Afghan police officer, entered the base on Tuesday night and blew himself up near a group of soldiers warming their hands near a fire, a Taliban spokesman told The Associated Press by telephone.

NATO later released a statement on the attack confirming that the bomber killed two of its service members and wounded several others. The statement did not provide nationalities or other details of the soldiers who were killed.

According to provincial police chief Yaqoub Khan, all the NATO bases in the area are run by U.S. troops.

The Taliban has had increasing success infiltrating heavily guarded military bases.

A suicide bomber infiltrated a CIA base in Khost city in December, killing seven CIA employees and a Jordanian intelligence officer.

According to information released after the attack, the CIA was grooming the bomber to retrieve information about al-Qaeda.

On Monday, NATO and Afghan forces thwarted a terror attack on local government headquarters in Khost city.

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Source: The Associated Press