The Jerusalem Post reported on Sunday that the primary weapon used by the Israeli air force in its initial massive wave of attacks on Gaza's terrorist infrastructure was the GBU-39 bunker-buster bomb.

Israel received its first shipment of 1,000 GBU-39 bombs from the US earlier this month, after winning approval from Congress in September to purchase the high-precision weapon.

Israeli forces used the bombs to great effect on Saturday and Sunday as they targeted underground Hamas facilities across the Gaza Strip.

The GBU-39 was developed by the US military as a small-diameter, low-cost weapon that would result in low collateral damage during pinpoint strikes.