Israeli Prime Minister Benjamin Netanyahu has said that Hamas is violating a humanitarian ceasefire the Islamist organisation called only a few hours ago.
Netanyahu told CNN that Hamas is "continuing all its operations" and Israel will do what it can to protect its own citizens.
Earlier, Hamas agreed to a new 24-hour ceasefire to start at midday UK time.
As the deadline passed, Israeli shells could be heard thudding into Gaza, and Israeli sirens warned, warning of Hamas missile attacks, reports Sky News.
In addition, witnesses in Gaza say they have seen rockets launched from Gaza after the ceasefire was called.
A previous ceasefire was broken this morning when Israel resumed attacks on Gaza, accusing Hamas of having broken the truce.
Palestinian medics said that 10 people had been killed in the new round of strikes.
During the lull in fighting, they said that 132 bodies had been pulled from the rubble.