LADAH: Three powerful bomb blasts rocked South and North Waziristan on Tuesday night killing six people, including four children, and injuring another, said security officials and residents on Wednesday. Unidentified people planted a bomb near the house of tribesman Khozi Khan, in Makeen in South Waziristan. The ensuing blast killed two women and four children of the same family. Authorities are investigating the matter. Some residents claimed it was because of a personal enmity while others said the tribesman was attacked because he supported the government against militants. In neighbouring North Waziristan, two bomb blasts damaged three shops and injured a passer-by in Miranshah. Last week, Taliban-linked militants distributed pamphlets warning shopkeepers to close shops on Fridays.