Israel says it has resumed air strikes in Gaza after Palestinian militants fired rockets following the end of a three-day truce on Friday.
The Israeli army called the renewed rocket attacks "unacceptable, intolerable and short-sighted", the BBC reports.
The Palestinian militant organisation Hamas earlier rejected any extension of the three-day ceasefire, saying that Israel had failed to meet its demands including the re-opening of Gaza Harbour to shipping.
Four weeks of fierce fighting between Israeli forces and militants in Gaza have claimed more than 1,900 lives.
Palestinian officials have said at least 1,875 people have been killed since Israel launched Operation Protective Edge with the aim of halting rocket fire from militants in Gaza and destroying the network of tunnels it said were used by militants to launch attacks inside Israel.
The UN has said 1,354 of those killed were civilians, including 415 children and 214 women.
Israel's government has said 64 soldiers were killed, along with two Israeli civilians and a Thai national. It has also claimed that about 900 Palestinian militants were killed in the fighting.