At least 12 people were killed in Israeli strikes across southern Lebanon Wednesday, including in the coastal city of Sidon, according to a Lebanese medical source.

Earlier, Israeli forces seized a municipal councillor and a worker from the border town of Kfarshuba, according to Lebanon's state-run National News Agency, while Israel said it "apprehended" two people who approached its soldiers.

A cease-fire in Lebanon, meant to have gone into force in April, was never observed and a new conditional truce announced after Lebanese-Israeli talks in Washington last week was rejected by Hezbollah and both sides have continued to trade fire.

The agreement did not mention a halt to Israeli attacks.

"The number of martyrs from the Israeli airstrikes in the town of Tayr Dibba is eight, and in Deir Qanun al-Nahr it is four," the source said, speaking on condition of anonymity.