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.

Israeli troops are understood to have made their deepest incursion into southern Lebanese territory since the recent offensive began on October 1, as the militant group Hezbollah considered its response to a fresh ceasefire proposal.