Israel’s military stepped up its bombardment of the Gaza Strip on Tuesday after Prime Minister Benjamin Netanyahu said his country should be prepared for a long conflict in the Palestinian enclave, quashing any hopes of a swift end to the conflict.

Palestinian health officials say attacks from Israeli warplanes and tanks have killed at least 100 people Tuesday in the most widespread attacks since fighting began three weeks ago. The Palestinian death toll has climbed to more than 1,100, mainly civilians.

Israel has lost 53 soldiers, two Israeli civilians and a Thai worker since launching its offensive July 8 in response to rocket attacks from Hamas and its allies.

Israeli tank fire hit the fuel depot of the Gaza Strip’s only power plant on Tuesday, witnesses said, cutting electricity to Gaza City and many other parts of the Palestinian enclave of 1.8 million people. Electricity already had been limited to several hours a day.

Israel targeted symbols of Hamas control, firing on the house of Hamas Gaza leader Ismail Haniyeh before dawn on Tuesday, causing damage but no casualties, Gaza’s interior ministry said.

Hamas said its broadcast outlets, Al-Aqsa TV and Al-Aqsa Radio also were targeted. Early Tuesday, at least two major explosions hit the media building, one of the tallest in Gaza, starting a fire on the roof and shaking surrounding buildings.

The television station continued to broadcast, but the radio station went silent.

The Abu Khadra government complex in Gaza City was badly damaged, and two mosques were hit. Residents also said 20 houses were destroyed during the night.