The flag of Hezbollah flies in Syria, where Hezbollah has become an active element in a civil war that has claimed the lives of 80,000 people. Photo: Hezbollah Flag/Wikimedia Commons.

Syrian President Bashar al-Assad has not given up on his effort to move advanced weapons to Lebanon’s Hezbollah, behavior Israel considers to be crossing a red line, an Israeli security official told Israel’s Walla News website Thursday.

The comment came only hours after reports surfaced that a Syrian weapons base had been destroyed by a missile attack from the sea. Several of the reports linked Israel to the strike. Israeli officials refused to comment on the claims.

Hezbollah has been aiding al-Assad in his fight against opposition rebel forces in the country’s ongoing civil war. For most of the nearly 3-year-old conflict Hezbollah had denied media reports that it was operating in the country, but earlier this year the terror group’s leader, Hassan Nasrallah, admitted publicly that it had taken on a role in the fight.