Medics say at least 11 Palestinians are killed and a dozen more injured after Israel hits Gaza Strip.
The latest airstrike late on Friday struck down three Palestinians after an apache fired rockets that hit a house and a car, medics told Al Jazeera.
An earlier strike targeted the leader of Popular Resistance Committees, Zuhair Al-Qaissi, and his military escort Mahmoud Al-Hannani, a Palestinian prisoner released from Israeli jails five years ago.
Witnesses said Israeli drones were seen hovering above just moments before al-Qaissi's vehicle burst into flames. The intensity of the blast was so fierce that al-Qaissi's head detached as a result, they said.
Islamic Jihad said that the three of those killed belonged to its military wing, the Al-Quds Brigades, looking to end Israel’s occupation of annexed Palestinian lands.
The Al Quds Brigades, part of Islamic Jihad group, said that strikes on the east side of the city had killed its members Obeid al-Gharabli, Mohammed Harara, Hazem Qoureqa and Shadi Seqali. It said that another two of its members, Fayeq Saad and Moatasem Hajaj, were also killed in other strikes.
In addition to the high profile strike, Israeli war jets carried out series of attacks at empty military training camps all over Gaza Strip.
The Israeli attacks came after Palestinians fired dozens of rockets and mortar rounds into southern Israel, wounding four people, one seriously, Israeli military sources claimed.
Circle of violence
The Palestinian Authority condemned the strikes, saying it had created a "negative environment" that would "escalate the circle of violence in the region," according to a statement released by the official Palestinian WAFA news agency.
The Israeli military said in a statement that Qaisi "was among the leaders who planned, funded and directed" a deadly cross-border attack into southern Israel from Egypt's Sinai last August.
The statement added that both the dead men were "responsible for planning a combined terror attack that was to take place via Sinai in the coming days." It said that other strikes were aimed at men about to fire rockets into Israel.
Hamas, which rules the Gaza Strip, has maintained a tacit truce with Israel, but other armed Palestinian groups regularly fire rockets and mortars across the border, which can spark air strikes in response.
"The recent Zionist escalation is an unjustified crime, it comes as a part of the destabilisation of a stable security situation in the Gaza Strip" the Hamas-run Gaza government's interior ministry said in a statement.
"We hold the international community fully responsible for the attacks." Before Friday's air strikes, Israeli army radio quoted what it called "senior military sources" as saying the army "does not intend to allow the firing to continue."