Overnight Israel’s military targeted 85 more sites in the area, rt.com reported.
Witnesses at the scene report massive damage from the strikes.
There were two series of strikes overnight: one at around 3 a.m. local time (01:00 GMT), and another at 5am (03:00 GMT).
Activists reported that bodies were under the rubble of a house hit by the strike in Jabalia, situated in Gaza’s north.
During the second string of strikes the Hamas leadership’s buildings were hit, but they are said to have been empty.
The IDF said it had targeted 85 more sites in the Gaza Strip during the past six hours, including the Hamas Gaza headquarters.
Amid an intensifying air offensive against Gaza, the Israeli cabinet also authorized the call-up of 75,000 reserve troops, reportedly in preparation for the possible ground invasion.
At least 30 Palestinians have already been killed in the assault that has been going on for four days, Ma'an news agency reported. Seven of the casualties were children. Three Israeli citizens also died in the violence.