JERUSALEM — Israel’s prime minister charged Thursday that Iran’s goal was to kill as many civilians as possible by giving Hezbollah what the military said were enough weapons to extend any war against Israel for one month.

Benjamin Netanyahu said the shipment of hundreds of tons of weapons on a seized ship Israel contends was bound for the Lebanese guerrilla group was a war crime that should be investigated by the U.N. Security Council. The Iran-backed Hezbollah denied that the arms were bound for them.