At least five militants were killed when their vehicle hit a roadside bomb apparently planted by a rival group in Pakistan's troubled Northwest. The bomb struck Amir Hamza’s vehicle, a local commander of the Sajna group in the remote Shaktoi area of South Waziristan tribal district late on Tuesday, killing him along with his four associates, the Taliban and officials said. "A local commander of Sajna group and his four associates have been killed," the local intelligence official told AFP on Wednesday.