Lebanese armed group Hezbollah confirmed its media relations chief Mohammad Afif was killed by an Israeli strike.

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.