ITV News has witnessed the aftermath of an attack on a UN school in Gaza, which has left at least 15 people dead and dozens more injured.

Warning: This report by ITV News Correspondent Dan Rivers contains distressing images

The Beit Hanoun elementary school, which was being used as a shelter, had around 800 people - mostly women and children - inside when the attack took place at 2.30pm today.

UN spokesman Adnan Abu Hassna told ITV News that the Israeli military attacked the school, despite having received the exact co-ordinates of the facility.

But Israel neither admitted or denied responsibility for the attack.

Dan Rivers reported seeing dozens of children lying in "pools of blood" in a local hospital.

A six-month-old baby boy had to be treated for shrapnel wounds after the attack.

Children are seen in distress as they are treated in a local hospital. Credit: ITV News

Five-year-old Yacov Shimbari lies in shock. Credit: ITV News/Jonathan Wald

Casualties are lying all over the hospital. Credit: ITV News/Jonathan Wald

The strike came on another day of fierce fighting in the region, despite continued diplomatic pressure for a ceasefire.

More than 700 Palestinians - mostly civilians - have been killed in the 16-day conflict.

Israel has lost 32 soldiers in the violence.

Read: The toddler who will have to bear the scars of the Middle East conflict