The death toll from a three-day Israeli raid on the occupied West Bank has risen to 20 while violence rages on in the Gaza Strip, AFP reports.

Israel has described its raids on towns and refugee camps across the northern West Bank as “counter-terrorism” operations.

They have killed at least 20 Palestinians since Wednesday, the military and the Palestinian Red Crescent said.

Hamas and Islamic Jihad have said at least 13 of those killed were their fighters.

An AFP journalist reported loud explosions from the city’s refugee camp and thick plumes of smoke rising from the area.

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