Air strikes killed up to 20 people in Lebanon, hours after the UN adopted a resolution aimed at ending the conflict.

At least four Hezbollah rockets were fired into northern Israel, causing two casualties, Israeli police said.

Israel expanded its ground offensive in the south, even though prime minister Ehud Olmert said he backed the UN vote and was expected to ask his cabinet to approve it today.

"We are fighting Hezbollah and will continue to fight it until a ceasefire is decided, but more than that, until it is decided what the mechanism for implementing (that ceasefire) is, " LieutenantGeneral Dan Halutz said. "We will continue to operate until we achieve our aims, " Israel's top general added.

A UN envoy said earlier the Israeli assault was expected to wind down in one to two days and an expanded international force to begin deploying in a week to 10 days. The UN resolution authorises up to 15,000 UN troops to move into south Lebanon to enforce a ceasefire. It also says Hezbollah must halt all attacks and Israel must stop "all offensive military operations".

Relief officials said Israel was still denying permission for aid convoys to reach distressed civilians in south Lebanon.