Israel has launched air strikes on Gaza in response to militant rocket fire from the Palestinian enclave, as tension rises following the deadliest army raid on the occupied West Bank in years.
The Israel Defence Forces (IDF) issued a statement saying it was currently striking in sites in Gaza.
Security sources in Gaza, which is controlled by the Islamist Hamas group, said there had been 15 strikes targeting militant sites, and reported no injuries.
The Israeli army said an initial two rockets were fired from Gaza towards Israel at midnight local time.
Shortly after Israel launched retaliatory strikes several hours later, another three rockets were fired from Gaza, the army said.
Another round of air-raid sirens then sounded in southern Israel.
The army said most of the Gaza rockets were intercepted by Israel's air defence system, one landed in an open area and another fell inside Gaza.
No group has claimed responsibility for the rocket fire, but Hamas and Islamic Jihad had earlier vowed to respond to yesterday's armed raid in Jenin, which killed nine Palestinians.
Israel described the raid as a "counter-terrorism" operation.
