Palestinian officials say Israeli airstrikes across the Gaza Strip have killed at least 14 people, half of them children.

The Civil Defense, first responders who operate under the Hamas-run government, said three children and their mother were killed in an airstrike late Monday in the Tufah neighborhood of Gaza City. It said three other people were missing after the strike.

Another strike late Monday hit a building in downtown Gaza City, killing a child, three women and a man, according to the Gaza Health Ministry.

In southern Gaza, a strike on a home early Tuesday killed five people, including a man, his three children as young as 3 years old and a woman, according to a casualty list provided by Nasser Hospital in Khan Younis, where the bodies were taken.

Palestinian health officials do not say whether those killed in Israeli strikes are civilians or fighters.

Israel says it tries to avoid harming civilians and accuses Hamas of putting them in danger by fighting in residential areas. But the military rarely comments on individual strikes, which often kill women and children.

Gaza’s Health Ministry says Israel’s offensive has killed over 40,000 people in Gaza. The war began when Hamas-led militants stormed into southern Israel on Oct. 7, killing some 1,200 people, mostly civilians, and abducting around 250 people.