Israeli planes bomb Gaza

Israeli warplanes bombed Gaza late Saturday after clashes between its troops and Palestinian protesters left dozens injured, including an Israeli border policeman and a 13-year-old Palestinian boy who were both critically wounded.

The Israeli military said it carried out air strikes against four weapons sites and that it had reinforced its Gaza division with additional troops.

The escalation came exactly three months since Israel and the enclave's Islamist rulers Hamas reached a truce following their deadliest fighting in years.

Israeli troops fired at Palestinian protesters who gathered near the Gaza border wall, the army and Palestinian witnesses said.

A Palestinian gunman fired at Israeli troops through an opening in the wall and crowds of young protesters hurled explosives over the barrier and tried to scale it. The Hamas-run Gaza health ministry said the injured included a 13-year-old boy left in a critical condition after being hit in the head.

"Forty-one civilians were wounded with various injuries," the ministry said in a statement, with Hamas saying "thousands" of protesters had taken part.