GAZA CITY (Ma'an) -- The Hamas government has filed a complaint to the UN against Israeli attacks on the Gaza Strip, a spokesman said.
Taher al-Nunu said government called on UN Secretary General Ban Ki-moon to pressure Israel to stop its attacks on civilians in Gaza.
Israeli tanks shelled Gaza City on Saturday killing four civilians and injuring at least 25. Israel's army said it was responding to a missile attack on an Israeli military jeep which injured four soldiers.
Gaza factions fired dozens of rockets into Israel in response to the deaths, with Israel launching an airstrike early Sunday which killed two members of Islamic Jihad's military wing.
Israel launched multiple airstrikes on the Gaza Strip overnight Sunday, with no injuries reported, and 11 rockets have been fired from Gaza since Monday morning. One rocket struck a home in the city of Netivot at around 7 a.m., causing material damage.
The Salafi organization, the Shura Council of the Mujahedeen, claimed that rocket and Israel promised a tough response.
"We have a full box of tools ... that we have not yet used," Israeli Vice Prime Minister Moshe Yaalon told Army Radio. "We will need to toughen our response until Hamas says 'enough' and ends the fire."
Witnesses told Ma'an that Israeli F-16 fighter jets were hovering over southern Gaza on Monday evening.
Egypt has been trying to broker a ceasefire between the Palestinian factions and Israel, a Palestinian official with knowledge of the contacts told Reuters.
"Nothing has yet been formalized. Israel and Hamas kept their old positions. Calm will be met with calm and escalation with escalation," the official said.Reuters contributed to this report.