GAZA CITY, Gaza Strip - Israeli helicopters fired missiles at Gaza City on Saturday, lightly wounding Hamas founder and spiritual leader Sheik Ahmed Yassin, Hamas officials said.

It was not clear whether Yassin - who had a hand injury - was in a car or a building when the missiles hit. He is the highest-ranking Hamas official to be targeted by Israel, which has killed 12 members of the group in six missile strikes in the past three weeks. Five bystanders have also been killed in the attacks.

Yassin's car was traveling on the street where the missiles hit, said Abdel Nasser Ramadan, a Palestinian medic.