Israeli warplanes struck a weapons manufacturing facility in the Gaza Strip early Saturday, the military said, after rocket fire against Israeli territory.
"Fighter jets struck a military site in the central Gaza Strip belonging to the Hamas terrorist organization. The military site consists of an underground complex containing raw materials used for the manufacturing of rockets," an army statement said.
Witnesses said the site is used as a training camp.
Sirens sounded in southern Israel on two occasions early on Saturday, warning of incoming rocket fire.
One rocket was intercepted and three projectiles landed in open spaces, the military said.