Vice Prime Minister Silvan Shalom said Sunday that Israel’s top security officials held a special meeting last week to discuss Syria’s chemical weapons arsenal. The fact of the meeting, held the morning after a national election, had not been made public before.

Shalom told the Army Radio station that the transfer of weapons to violent groups, particularly the Iranian-backed Lebanese Hezbollah, would be a game changer.

“It would be crossing a line that would demand a different approach, including even action,” he said. Asked whether this might mean a pre-emptive attack, he said: “We will have to make the decisions.”