A bomb blast in the Afghan capital Wednesday wounded three people, the government said, as the NATO-led military announced it had killed 33 rebels. The bomb was planted outside a petrol station in a western suburb of the city and wounded three civilian passers-by, the interior ministry said. In a statement late Tuesday, NATO's International Security Assistance Force said troops clashed with militants on Saturday in Kapisa province, northeast of Kabul, and an assessment of the battle was ongoing.