Al Jazeera Arabic reports that Israeli forces have attacked a residential building in Gaza City, killing at least four people and wounding three others.

The attack followed an earlier deadly air raid on a ruined mosque at the Shati refugee camp, which is also in Gaza City. At least 20 people were killed in that attack.

The Israeli military had ordered Palestinians last week to immediately leave Gaza City, in the besieged north of the Gaza Strip, where some 300,000 people were estimated to have remained.