KHAR: A tribal elder was killed in a roadside blast in Charmang in Nawagai tehsil of Bajaur tribal region on Tuesday, tribal sources said.The sources said Malik Ataullah Khan was on his way home in Hashim village when a time device planted alongside the road exploded, killing him on the spot.The security forces cordoned off the area and launched search operation.The locals said the slain tribesman, in his 50s, had no enmity. No group claimed responsibility for the killing.