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.

Mohammed Afif, the head of media relations for Hezbollah, was killed in a strike on the Arab socialist Baath party's office in central Beirut, officials said.

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.