Israeli air strikes have hit a number of targets in Gaza, killing at least one person and wounding at least one other, Palestinian medics had said.
Three people, including a 14-year-old-boy, have been killed in Israeli air strikes overnight in the Gaza Strip, Palestinian medics say.
The strikes came after a day in which about a dozen rockets were fired from inside Gaza into Israeli territory.
The Israeli military said it was responding to mortar and rocket attacks on Thursday on Israel from Gaza.
Explosions rocked Gaza City, Khan Younis and smuggling tunnels in Rafah.
It said it attacked two tunnels on the border with Egypt, a tunnel to be used by militants for crossing into Israel and a weapons making site.
On Thursday, Israel's government said it would pay $10m in compensation for damage caused to UN buildings in Gaza during the offensive there a year ago.
The strikes hit targets Gaza City, Khan Younis and Rafah.
A number of UN warehouses, school buildings, offices and vehicles were damaged or destroyed in the 23-day assault, which was intended to end rocket attacks by militants.
The militant group Hamas, which controls Gaza, said an Israeli jet had also bombed a building in Gaza City.
Israeli officials said the payout - the first such compensation related to the offensive, in which about 1,300 Palestinians and 13 Israelis were killed - was for collateral damage. The UN said the deal had yet to be confirmed, but that it expected progress "imminently".
On Thursday, Israeli planes dropped thousands of leaflets over the Gaza Strip warning residents to steer clear of the border after Palestinian militants fired mortar rounds into Israel.
Palestinian medics said Friday's casualties were the result of early-morning air strikes on two smuggling tunnels in Rafah, which lies near Gaza's southern border with Egypt. The militant group Hamas, which controls Gaza, said a jet had also bombed a building in Gaza City.
Gaza militants have fired more than 280 rockets or mortars at Israel since the end of a devastating offensive against the territory on January 18, according to the Israeli military.
The Israeli military later told Israeli media that its aircraft had bombed a tunnel linking the Gaza to Israel, a weapons factory in Gaza City, and two smuggling tunnels running underneath the border with Egypt.
Palestinian groups and human right organisations say about about 1,400 Palestinians died during the offensive. Thirteen Israelis were also dies in the fighting.
