A suicide bomber detonated his explosives in front of a high school in Iraq's violent Diyala province Tuesday, wounding 21 people, police said. Students, teachers, bystanders and at least one policeman were among the wounded in the 8:30 a.m. attack in the provincial capital, Baqouba, according to a police officer. The bomber's target was unclear. The school is next to the provincial governor's office and a municipal building. Meanwhile, in Baghdad's Shi'ite eastern Mashtal area, a roadside bombing wounded two policemen Tuesday morning, a Baghdad police officer said. Another roadside bombing near a passing police patrol wounded four people - two policemen and two female bystanders - in the Madain area, about 24 kilometers southeast of Baghdad, police said.