Israel has launched a series of air strikes on Gaza after Hamas militants fired rockets into the south of the country.
At least 10 rockets have hit the Jewish state despite seven Israeli air strikes overnight.
The violence has entered its third day and Israeli police have raised their level of alert in the towns and villages within rocket range, although there were no casualties in the latest strikes.
On Wednesday morning, medics reportedly said a Palestinian man was killed in an Israeli air strike on Rafah in the southern Gaza Strip, raising the toll from three days of violence to seven Gazans dead.
The strike targeted a man riding a motorcycle in the sprawling city which lies on the southern border with Egypt, medics said. There was no immediate confirmation from the Israeli military.
Five others have been wounded since the bloodshed erupted on Monday morning, but officials in the Hamas-run Gaza Strip said there were no casualties in the overnight attacks.
"Overnight, IAF (Israel Air Force) aircraft targeted six terror activity sites in the Gaza Strip. Hits were confirmed," a military statement said, later confirming a seventh strike in what it said was a response to the persistent rocket fire.
Among the sites hit were a training centre used by militants, the Ezzedine al Qassam Brigades, and several naval police outposts, Palestinian security sources said.
The raids took place several hours after a rocket hit an Israeli border police outpost in Yad Mordechai, just north of the Gaza Strip, wounding four border policemen, one of them seriously, Israeli police spokesman Micky Rosenfeld said.
In total, 45 rockets hit Israel on Tuesday, all of which were claimed by the Hamas armed wing in a rare show of force. Previously, the group had been observing a de facto truce on rocket attacks.
As the violence rumbled on, a senior Gaza official said Egypt was in contact with Israel and the militant groups in a bid to restore the calm.
"The Palestinian factions are ready to return to the calm as long as Israel stops its attacks," he said, speaking on condition of anonymity.
Giora Eiland, Israel's former national security adviser, said he believed that Hamas would "find a way to calm things down and return the quiet in the next two or three days after proving to the other factions that it is capable of acting against Israel".
