Israel’s response to Saturday’s Hezbollah rocket barrage that killed 12 children in the Golan Heights will be “tough,” Prime Minister Benjamin Netanyahu vowed on Monday during a visit to Majdal Shams.

“With Iranian backing, Hezbollah attacked here with an Iranian missile, taking the lives of 12 pure souls. Twelve boys and girls who played soccer here and, sadly, could not make it to a shelter,” the premier said as he placed a wreath at the disaster site on behalf of the government.