At least 45 people have been killed in an Israeli air strike on a camp for displaced Palestinians in the southern Gaza city of Rafah, the Hamas-run health ministry says.
Videos from the scene in the Tal al-Sultan area on Sunday night showed a large explosion and intense fires burning.
The Israel Defense Forces said it had killed two senior Hamas officials and that it was reviewing reports that civilians were harmed as a result of the strike and fire it ignited.
Hours earlier, Hamas had fired eight rockets from Rafah towards Tel Aviv - the first long-range attacks on the central Israeli city since January.
