The US president told Israeli Prime Minister Netanyahu he was ‘deeply saddened and outraged’ by the explosion in the Gaza Strip.

"Our leaders could have spoken up for peace. They chose to cheer on war instead", Jeremy Corbyn said on the back of the attack.

The result was a huge victory for Donald Tusk, the head of the largest opposition group, Civic Coalition.

Ruling Law and Justice party looks likely to fall short of majority as opposition parties celebrate success.

“Forget about food, forget about electricity, forget about fuel. The only concern now is just if you’ll make it, if you’re going to live.”

Israel has ordered the evacuation of northern Gaza, including Gaza City.

Kfar Azza was one of more than 20 towns and villages attacked by Palestinian fighters early on Saturday.

Israel has stopped the entry of food, water, fuel and medicine into the territory following attacks orchestrated by Hamas.

Planes have already taken off, said the official, who declined to provide details on the weapons.