By Maya Gebeily BEIRUT (Reuters) -A U.S. envoy said on Monday he was "unbelievably satisfied" with Lebanon's reply to a U.S. proposal on disarming Hezbollah, following meetings in Beirut held hours after Israel launched new air strikes and a cross-border incursion.

Naim Qassem says his group will not surrender or lay down weapons in response to Israeli threats, despite pressure on the group to disarm. The Hezbollah chief says the Lebanese group remains open to peace, but it will not disarm or back down from confronting Israel until it ends its air raids and withdraws from southern Lebanon.