KABUL, Dec 5 (Reuters) - A suicide bomber targetted a bus carrying Afghan army personnel in the capital Kabul on Wednesday, causing a number of casualties among the occupants, a government spokesman said. The bomber used a car in the attack, which happened during the morning rush hour in the southwestern part of the city. On Tuesday, a NATO convoy was hit by a similar attack close to Kabul's international airport. There were no casualties among NATO forces, but 22 Afghans were wounded in the that raid, according to NATO. (Reporting by Sayed Salahuddin, editing by Jerry Norton)