Millions of children in Ethiopia's Tigray out of reach
In a statement late on Dec. 15, UNICEF said the situation will worsen if access to the children is delayed.
"Protecting these children, many of whom are refugees and internally displaced, and providing them with humanitarian aid must be a priority," it said.
UNICEF also called for "urgent, sustained, unconditional and impartial humanitarian access to all families in need wherever they are."
Early December, the UN announced that agreement has been reached with Ethiopia to allow "unimpeded, sustained and secure access" for humanitarian supplies to reach those in need across areas under its control in Tigray.
Ethiopia launched on Nov. 4 a "law enforcement operation" against the Tigray People's Liberation Front (TPLF) whose forces stormed an army camp, looted military hardware and killed soldiers.
Up to 50,000 Ethiopian refugees who have crossed into eastern Sudan, with some reporting having to evade armed groups to reach safety, according to the UN Refugee Agency.
Early this month, Michelle Bachelet, the UN High commissioner for human rights, said the situation in Ethiopia is "exceedingly worrying, volatile, and distressing" with an urgent need for independent monitoring of the human rights situation in the conflict-stricken Tigray region.
Prime Minister Abiy Ahmed declared the end of military operations in the region on Nov. 28 after the fall of the regional capital Mekelle.