JERUSALEM (AP) — Israel will “know how to defend” itself should violence spill across the border from the civil war in neighboring Syria, Vice Premier Moshe Yaalon said Friday.

Yaalon said that Israel has recently conveyed several messages to Syria and Damascus had “conducted itself appropriately.” But in his Twitter message Friday, he said Israel would know how to react if violence was “spreading in our direction.”

In the past week, Israel has seen Syrian mortar rounds and bullets land in Israeli territory and tanks enter a demilitarized zone in the Golan Heights. Israeli security officials believe the incidents have been inadvertent; Jerusalem has not threatened to retaliate.

On Thursday, IDF soldiers detained a 15-year-old Syrian boy after he was caught attempting to cross the border into Israel.

The frontier has remained largely quiet over most of the past four decades.

Copyright 2012 The Associated Press.