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.

Palestinian officials say an Israeli strike hit a tent sheltering displaced people in the Gaza Strip, killing two children aged 7 and 9 and their parents.

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, said officials.