At least four persons were killed in a car bomb blast at Lakki Marwat area here in Dera Ismail Khan. Sources said that a car bomb blasted at Baramkhel area of Lakki Marwat here. Police told that one white colour car no sooner reached near Marwat canal, it blasted with a bang, which killed four persons. Parts of human bodies were seen splintered in the car. Police apprehend that the suicide bomber was present in the car, who wanted to reach some targeted place. Bomb disposal squad has been called. Following yesterday's suicide attack, D. I. Khan town was under cufew and security forces continued patrolling the town.