"We don't know where things are headed," Nasrallah, via a video link to a giant screen, told a crowd gathered in Beirut to show solidarity with revolts sweeping the Arab world.
"This opens the way for foreign interference in every Arab country, bringing us back to the days of occupation, colonisation and partition," he said. "The situation in Libya is now very complex."
The air strikes mounted under a UN Security Council resolution follow a month-long showdown between Libyan security forces and rebels calling for the overthrow of Libya's strongman Moamer Kadhafi.
"The rebels need to be aware that international intervention could embroil Libya in the great game of nations," Nasrallah said.
"We are here to tell them: 'We are with you, we support you ... we are ready to come to your aid in your best interests and ours, to the best of our ability,'" he said.
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