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.

An Israeli strike on a building in central 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.

Schools in Beirut were closed on Monday after Israeli strikes on the Lebanese capital killed six people including Hezbollah's spokesman, the latest in a string of top militant targets slain in the war.