A suicide bomber blew himself up near the venue of a political rally at Battagram in north-west Pakistan today, killing seven persons and injuring 25 others. Police said, the bomber struck as workers of the PML-Q party, which is part of the ruling coalition at the Centre, were preparing for a rally to be addressed by senior party leader and former Federal Minister Amir Muqam. The bomber detonated his explosive vest after he was stopped by policemen. No group has claimed responsibility for the attack though Pakistani Taliban is the usual suspect in such blasts.