The Palestinian militant group Islamic Jihad fired a barrage of rockets into Israel on Monday as fighting raged in Gaza and Israeli tanks advanced deeper into parts of the enclave, residents and officials said.

Islamic Jihad, an ally of Hamas — both of whom Iran backs — said its fighters fired rockets toward several Israeli communities near the fence with Gaza in response to "the crimes of the Zionist enemy against our Palestinian people."

The volley of about 20 rockets caused no casualties, the Israeli military said.