An Israeli fighter jet has crashed amid Syrian anti-aircraft fire after an offensive against Iranian targets in Syria, the Israeli military says.

The two pilots ejected and parachuted to safety in Israel. They were later taken to hospital.

Israel said its aircraft, an F-16 jet, was carrying out strikes in response to the launch of a drone into Israeli territory. The drone was intercepted.

Red alert sirens sounded in areas of northern Israel and the Golan Heights.