About 200 militants crossed into Pakistan's rugged northwest from Afghanistan on Wednesday and attacked a security checkpost, killing one policeman, police said, and a television station put the death toll at seven. It was not clear whether the militants were Afghans or Pakistanis. The border area is a global hub for militants, including al Qaeda and allies such as the Pakistani Taliban, who seek to topple the U.S.-backed Islamabad government. The pre-dawn assault was launched in Shaldalo village in the mountainous northwestern region of Dir and fighting was still continuing, police said. "They (militants) were in military uniform. They attacked the outpost and then went into forest there," Mahmood Ahmed, a police officer in the region, told Reuters by telephone.