All those who remain in northern Gaza — especially children — are “at imminent risk of dying” from disease, famine and ongoing bombardments there, UNICEF’s executive director warned.

There were several deadly attacks in the north over the weekend, Catherine Russell said in a statement Saturday, The Washington Post reported.  

She said at least 50 children were reportedly killed Friday and Saturday in Jabalya, where two residential buildings in which hundreds of people sought shelter were hit by strikes.

The month-long Israeli operation targeting Jabalya, Beit Lahia and Beit Hanoun has worsened the desperate situation in Gaza’s north. 

The World Health Organization reported an attack Saturday on a healthcare center in Gaza City where a polio vaccination drive was taking place. At least six people, including four children, were injured, WHO chief Tedros Adhanom Ghebreyesus said, adding that the attack took place during a humanitarian pause that Israel agreed to.