An Israeli airstrike killed five people in central Beirut on Monday, Lebanon's health ministry said, the second day in a row Israel has hit a target within the capital as it presses its campaign against Iran-backed armed group Hezbollah.

The spokesperson of the Lebanese militant group Hezbollah, Mohammed Afif, was reportedly killed in an Israeli strike on Beirut on Sunday.

The latest in a series of targeted killings of senior Hezbollah officials came as Lebanese officials were considering a United States-led cease-fire proposal.