Israel’s military says infantry backed by tanks have carried out “localised raids” in the Gaza Strip.
It comes ahead of an expected ground operation, with Israel warning more than a million people in the north of Gaza to evacuate to the south.
The small raids were carried out to attack Hamas rocket crews and seek information on the location of hostages taken by Palestinian gunmen last Saturday, Rear Admiral Daniel Hagari said.
It is the first time the Israeli military has stated ground troops have been operating inside the besieged strip, entering the territory to battle Hamas fighters and destroy weapons as well as search for evidence about the captives.
Israeli forces have been conducting days of retaliatory airstrikes on Gaza targeting Hamas since the ruling Palestinian militant group stormed the border with Israel at the weekend, killing hundreds of people in their homes – as well as 260 others at a music festival.
Israel said a total of 1,300 of its people have died since Saturday’s surprise raid as its troops continue to mass along the barbed wire fence ahead of a possible ground offensive on Gaza, with 300,000 reservists called up.
Around 150 hostages are thought to be held in the narrow coastal enclave by Hamas which has been attacking Israel with rockets.
Meanwhile, at least 500 children and 276 women are among the estimated 1,799 Palestinians who have died in Israeli strikes with more than 6,300 wounded, the Gaza health ministry has said.
The United Nations has said it is “impossible” for Palestinians to move to the south of Gaza in the next 24 hours, after citizens were ordered to evacuate by Israel’s military.
The UN’s Palestinian refugee agency has warned Gaza was becoming a “hell hole” and was on the “brink of collapse”.
Israel has been dropping leaflets written in Arabic into the Gaza Strip urging people in the north of the area to move south across the Wadi Gaza – a piece of coastal wetland with a river running through the middle.
UN officials in Gaza “were informed by their liaison officers in the Israeli military that the entire population of Gaza north of Wadi Gaza should relocate to southern Gaza within the next 24 hours,” UN spokesman Stephane Dujarric said in a statement in New York.
“This amounts to approximately 1.1 million people,” he added, or nearly half of Gaza’s 2.3 million population.
Mr Dujarric said the UN “considers it impossible for such a movement to take place without devastating humanitarian consequences”.
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