A powerful airstrike killed 15 people in central Beirut on Saturday and 13 others were killed in attacks northeast of the Lebanese capital, the health ministry said, as Israel pressed its offensive against the Iran-backed Hezbollah group.

The strikes, which destroyed an eight-story building and left a crater in the ground, were the fourth in Beirut in less than a week.

Israel was targeting a senior Hezbollah commander, but failed to kill him, one Israeli official said. Hezbollah officials said none of the group’s leaders were at the attack site.