Hezbollah vows revenge for a Hamas after top chief killed in Beirut, IDF on high alert. Senior Hamas official Saleh al-Arouri was killed on Tuesday after being struck by and Israeli drone strikes in Beirut. Arouri was one of the founders of Hamas' military wing. Subscribe to LiveNOW from FOX! https://www.youtube.com/livenowfox?sub_confirmation=1 Where to watch LiveNOW from FOX: https://www.livenowfox.com/ Follow us @LiveNOWFOX on Twitter: https://twitter.com/livenowfox Raw and unfiltered. Watch a non-stop stream of breaking news, live events and stories across the nation. Limited commentary. No opinion. Experience LiveNOW from FOX.