Israeli warplanes have been bombing Gaza since Monday night in retaliation to a rocket attack which reportedly injured seven people.
Dozens of Palestinians have been seriously injured in the airstrikes, which the Israeli military claims targeted three buildings used by Hamas, the Islamic resistance group which governs the besieged Gaza strip.
The Israeli army said one of the targets in Gaza was the office of Hamas’s political leader Ismail Haniyeh.
Palestinian media outlets released footage of explosions that showed the moment the office was hit in the Rimal district of Gaza City.
The occupying Israeli army said they also attacked a three-storey building in the neighbourhood of Tzabra which was “a secret headquarters of the Hamas” and a five-storey block used for Hamas’s interior security.
Resistance groups in Gaza responded with firing rockets at the southern Israeli cities of Ashkelon and Sderot.
Hamas said yesterday that it will respond if Israel retaliates disproportionately.
In a written statement, Ismail Haniyeh said the Palestinian people “will not surrender” and its armed factions “will deter the enemy if it exceeds the red lines”.
Police and security officers evacuated and hospitals in Gaza have been on high alert since the Israeli airstrikes.
No group has claimed responsibility for the rocket attack in Israel, but Israel’s military spokesperson Major Mika Lifshitz said they had concluded that Hamas fired the rocket from a launchpad near Rafah.
UK foreign secretary Jeremy Hunt said the attack on Israel was “completely unacceptable”.
He tweeted: “Appalled by terrorist attack from Gaza against civilians, including British-Israeli dual nationals. My thoughts are with all those affected.”