A powerful airstrike killed 11 people in central Beirut on Saturday, the health ministry said, shaking the capital as Israel pressed its offensive against the Iran-backed Hezbollah group.

An eight-story building was struck with four missiles, including bunker-penetrating types designed to hit underground targets, said a Lebanese security source.

Israel has used bunker-busting weapons to kill senior Hezbollah figures, including its veteran leader Hassan Nasrallah in a strike on southern Beirut in September.