Israel storms into Gaza after border killing
Israeli tanks and helicopters have re-entered the Gaza Strip.
Tanks and bulldozers have reportedly been seen operating inside Gaza for the first time since they pulled out last week.
After the ten day break in fighting, an Israeli officer has been killed after in a bomb incident on the Gaza border with Israel.
Israeli officials have said the officer was on patrol when an explosion hit his army jeep, killing him and wounding three others.
The Israeli army says it was deliberately detonated from inside Gaza.
Helicopters were later sent in to fire at targets in the city of Khan Younis.
Hamas has blamed Israel for breaking the ceasefire and has asked for Israel to "lift the siege" and reopen all the border crossings, including the Rafah crossing.