A suicide bomber blew himself up among a group of Iraqi army recruits in northern Iraq on Friday, killing 25 people and wounding 35, police said. They said the attack occurred outside a municipal building in Rabia, a town 80 km (50 miles) northwest of Mosul, close to the Syrian border. No other details were immediately available.Police and army recruits are frequently targeted by insurgents. In recent months, attacks by suicide bombers strapped with explosives -- as opposed to driving explosives- laden cars -- have become more common. U.S. forces believe insurgents have been flowing into Iraq across the border from Syria. Rabia is less than 10 km from the Syrian border. Tal Afar, another town in the area, has been a stronghold of rebels for several months.