Police rounded up several suspects to probe late Sunday night bomb explosion at a church in high security area of Mardan, police sources said Monday. It was the first bomb attack on a church for the past few years in the insurgency-hit northwest Khyber Pakhtunkhwa province, which is the frontline in the United States-led war on terror. A remote-controlled bomb planted near the wall of Lotharan church in the cantonment area was detonated Sunday midnight, injuring two policemen and created panic in the area on the second day of the Muslim annual "Eid" festival. The front wall and parts of the church collapsed. However, no loss of life was reported and the injured were admitted to hospital where they were reported to be in a stable condition. Local police said the explosion could have caused major casualties and damage had it occurred during the day time in the busy downtown area. A garment market, mosque, school, a playground and some important buildings are located around the church.