Four Palestinians, including a top militant commander have been killed in an air strike by the Israeli army on a car in Gaza. Medics said the militant was a senior commander of Islamic Jihad, an organisation which has masterminded dozens of anti-Israeli attacks. The air strike also killed two Palestinian women and a four-year-old boy. Another woman and a child were among the wounded. The Israeli army said the militant had engaged in recent rocket attacks against the Jewish state.