At least two people were killed and 19 others injured in a suicide attack at a restaurant in the northern Iraqi city of Samarra on Saturday, reported the Aswat al-Iraq new agency, citing Iraqi police. Iraqi police sources told the German Press Agency (dpa) that the blast occurred when a suicide bomber detonated explosives strapped to his body in a restaurant in central Samarra, approximately 110 kilometers north of Baghdad. Victims included police officers and members of pro-US militias. Also Saturday, a man was killed in a hand grenade attack in Baghdad. Two others were wounded in the attack. Separately, two suspected al-Qaeda members and a doctor were arrested in Iraq, US forces and Iraqi police said earlier Saturday. The al-Qaeda suspects were detained in two separate security operations (one in western Baghdad, and the other in Haditha, some 200 kilometers north of the capital), the US military said in a statement. Both are suspected of assisting in the movement of money and explosives for al-Qaeda.