One policeman was killed when 200 militants crossed into Pakistan’s northwest from Afghanistan and attacked a security check post on Wednesday, reports Reuters quoting police. A local television station reported the death toll at seven.

The border area of Pakistan and Afghanistan is a center for al-Qaeda militants and Pakistani Taliban, who seek to collapse the U.S.-backed Islamabad government.

The attack was launched in Shaldalo village in the mountainous northwestern region of Dir, police said.

Militants were in military uniform when they attacked the check post and then went into forest, Mahmood Ahmed, a police officer in the region, told Reuters.

Al-Qaeda militants who have promised to take revenge from U.S. special forces for the killing of Osama bin Laden on May 2, have increased their attacks, mostly suicide bombings.

Seven people were killed in Wednesday attack, Pakistan's Express 24/7 television said.

All communication with the village had been cut off after the attack, Ahmed said.