Israeli air strikes on the Gaza Strip have continued into a sixth day, as Israel rejected international calls for a 48-hour truce.
Palestinian officials say nearly 400 people have now died in the violence, with the UN saying a quarter of those were civilians.
Several Hamas buildings have been destroyed, including the Justice Ministry, Legislative Assembly and Education ministry.
The UN has warned of a humanitarian disaster in Gaza, saying thousands of people have received no food aid for two weeks.
However, Israeli military officials have said that supplies of food and medical aid are getting into the coastal enclave.
Israel says its actions are necessary to prevent rocket attacks on its citizens, and that it is only targeting Hamas militants.
It said conditions for a truce were not right and any ceasefire would have to be permanent.
Rockets fired from Gaza have been landing up to 40km (28 miles) into Israel, killing four Israelis since the latest violence began.
Israel says as much as 10% of its population is now with range of the Hamas rockets.