An Israeli strike on a building in a densely populated district of Beirut on Sunday killed Hezbollah's media relations chief Mohammad Afif, two Lebanese security sources told Reuters, though there was no immediate confirmation from Hezbollah.

The attack came as Israel’s military has been pounding an area just outside the Lebanese capital with some of the heaviest waves of bombardment in months.

The Hezbollah militant group has a strong presence in central Beirut, known as the Dahiyeh, and the strikes came as Lebanese officials are considering a U.S.-brokered cease-fire proposal.