The Lebanese militant group captured an advanced Israeli anti-tank missile in the 2006 war, and its ally, Iran, reverse-engineered it, Israeli officials say.

Israel and Lebanon's Hezbollah traded deadly blows on Thursday as their war raged on despite signs of progress in U.S. ceasefire efforts, with airstrikes pounding Beirut's southern suburbs and rockets flying into northern Israel.

Qassem made his comments in a pre-recorded address aired a few hours after U.S. envoy Amos Hochstein said he would head to Israel to try to close a deal on a truce, after two days of meetings with Lebanese officials including two sit-downs with parliament speaker Nabih Berri, a Hezbollah ally.