Hezbollah chief threatens Israel after Beirut 'drone attack'

The head of Hezbollah on Sunday threatened Israel after a "drone attack" on the Lebanese Shiite movement's Beirut stronghold, vowing to "do everything" to thwart future attacks.Hezbollah, considered a terrorist organisation by Israel and the United States, is a major political actor in Lebanon and a key government backer in war-torn Syria.The Shiite movement and Israel, which have fought several wars, have upped their belligerent rhetoric in recent months.