Israeli helicopters opened fire toward farmland in the Sheikh Ajlen area west of Gaza City late Thursday, witnesses said.
No injuries were reported.
An Israeli military spokeswoman said aircraft fired warning shots in response to rocket fire.
Earlier, several rockets were fired toward the western Negev, Israeli media reported.
A Grad rocket was intercepted by a nearby "Iron Dome" battery, and another rocket landed in an open area in the Eshkol regional council outside Hof Ashkelon, Israel's Ynet news service reported.
There were no reports of injury or damage.
Aircraft open fire west of Gaza City
15 مارس/آذار 2012 الساعة . 10:54 م بتوقيت القدس