A new conflict has opened up on the troubled border between Lebanon and Israel.

It started with pagers and walkie talkies exploding in the very hands of their owners, and then it moved to airstrikes - the deadliest in decades - before the latest news that Hezbollah's leader Hassan Nasrallah was killed.

Today, foreign affairs and national security correspondent Matthew Knott on the likelihood of an all-out war between Israel and Lebanon.

Subscribe to The Age & SMH: https://subscribe.smh.com.au/

See omnystudio.com/listener for privacy information.