BBC on scene of damage after blast at Gaza refugee camp
The Hamas-run health ministry in Gaza says more than 30 people have been killed in an Israeli air strike on the al-Maghazi refugee camp, which is in the part of the Gaza Strip civilians have been told to evacuate to.
The Israeli military says it is looking into whether it was operating in the area at the time.
As the BBC's Rushdi Abualouf reports, people are searching through rubble of destroyed buildings.