Israel's defence minister Yoav Gallant tells troops in the north they are prepared to use forces "from the air, sea, and land".

Hezbollah is "ready for a ground engagement," deputy chief Naim Qassem said in his first speech since leader Hassan Nasrallah was killed.

Israel has killed many of Hezbollah's senior leaders with devastating strikes in Lebanon, but neither side appears ready to step back from the brink.