The airstrikes were an Israeli response to the earlier firing of three rockets at southern Israel.
The witnesses said that Israeli army drones and fighter jets were heard buzzing in the air and several explosions were heard west of the southern Gaza Strip cities of Khan Younis and Rafah, Xinhua news agency reported.
Palestinian medical sources said that no injuries were reported during the strikes mainly targeting the Islamic Resistance Movement (Hamas) and the Palestinian Islamic Jihad (PIJ).
The airstrikes were an Israeli response to the earlier firing of three rockets at southern Israel, said an Israeli army spokesman. No group has claimed responsibility for firing the rockets.
Militants in the Hamas-ruled coastal enclave also fired at least five rockets at southern Israeli communities close to the borders with the Gaza Strip during the airstrikes, sources close to Hamas security told Xinhua, adding that an anti-craft missile was fired at Israeli fighter jets by Hamas militants.
Media outlets in Gaza quoted an Egyptian source as saying that Egyptian intelligence is in intensive contact with the Palestinian factions to avoid an escalation in Gaza.
Indo-Asian News Service
Tension between Israel and the Palestinians has risen over the past week, after six Palestinian militants escaped from a maximum security Israeli jail on Monday. Israeli forces have since captured four of the inmates.
The Israeli army said in a statement, “In response to continual launches of incendiary balloons from Gaza into Israel throughout the day, a short while ago IDF fighter jets struck a Hamas military compound and a rocket launching site.”
Saturday's violence erupted after hundreds of Palestinians took part in a demonstration organised by Gaza’s Hamas rulers to draw attention to the Israeli-Egyptian blockade of the territory.
On both sides of the border, residents jolted out of sleep by the pre-dawn quake rushed outside on a cold, rainy and snowy winter night, as buildings were flattened and strong aftershocks continued.
It said the targets of the raid were suspected of an attempted attack on a restaurant in the Israeli settlement of Vered Yeriho on Jan. 28. The Palestinian health ministry said three people had been wounded, one critically but it gave no details on any dead.
Under Pakistan's controversial blasphemy laws, anyone found guilty of insulting Islam or its figures can be sentenced to death, although the country has yet to carry out capital punishment for blasphemy.