Pakistani police say a burka-clad suicide bomber blew herself up near a Christian school in the northwestern city of Peshawar Tuesday.

Authorities said the woman was killed, but there were no other casualties. They said it was the first suicide bombing by a woman in Pakistan.

Elsewhere, officials say suspected pro-Taliban militants abducted six Pakistani security personnel late Monday and blew up their checkpoint in a troubled tribal region near the Afghan border.

The attack took place near the town of Khar, in the tribal district of Bajaur.

And Afghan officials say they have arrested a suspect in Monday's bombing of an Islamic school in the northern province of Baluchistan.

Six students were killed when a bomb exploded at a madrassa in southwestern Qilla Saifullah, a town near the Afghan border. No one has claimed responsibility for the attack.

Pakistan has been battling increased militancy in its tribal regions by militant groups who oppose U.S. operations in Afghanistan and Pakistan's alliance with Washington in fighting terrorism.

Some information for this report was provided by AFP, AP and Reuters.