Israeli warplanes have bombed sites in the port of Sidon, the capital Beirut, as well as the Baalbek area, which are suspected to house Hezbollah militants.
The air strikes come a day after Israel said it had taken the village of Maroun al-Ras, said to be a Hezbollah rocket base, after days of heavy fighting.
Three European envoys are scheduled to hold talks with Israel on Sunday, ahead of a visit by the US Secretary of State.
Israeli officials are scheduled to meet German Foreign Minister Frank-Walter Steinmeier , French Foreign Minister Philippe Douste-Blazy and UK Foreign Office Minister Kim Howells.
US Secretary of State Condoleezza Rice is travelling to the Middle East on Sunday.