Israel has bombed several targets in the Gaza Strip, witnesses say, hours after the Israeli government vowed a "disproportionate response" to rocket fire from the Palestinian territory.
An Israeli security official confirmed the attack, one of which was on an empty police station, on Sunday, Al-Jazeera reported.
"The air force has carried out several strikes across the Gaza Strip," he said.
There were no reports of casualties or injuries in the strike on the building.
The bombing followed a warning by Ehud Olmert, the Israeli prime minister, of severe reprisals in response to renewed rocket fire into southern Israel.
"We've said that if there is rocket fire against the south of the country, there will be a severe and disproportionate Israeli response to the fire on the citizens of Israel and its security forces," he said on Sunday at the weekly cabinet meeting.
At least three rockets were fired into Israel from the Gaza Strip on Sunday, but caused no damage or injuries, police said.
The al-Aqsa Martyrs Brigades group told Al Jazeera that it carried out the attacks.
Later a mortar barrage on the village of Nahal Oz, next to the Gaza border fence, wounded two soldiers and a civilian, the Israeli military and rescue services said.