Syrian President Bashar Assad says he will shower Tel Aviv with rockets if outside forces launch a military strike against his country.
Assad is worried Turkish forces might invade as part of a NATO effort to bring down his regime.
His threat came after a meeting with Turkish Foreign Minister Ahmet Davutoglu on Tuesday.
"If a crazy measure is taken against Damascus, I will not need more than six hours to transfer hundreds of rockets and missiles to the Golan Heights to fire them at Tel Aviv," Assad said.
He made the comment after Davutoglu reportedly conveyed a warning message from the United States to Assad, YNetnews.com reported, attributing the information to an unverified story from the Iranian FARS news agency.
According to FARS, Assad vowed that Damascus would call on Hezbollah in Lebanon to launch a rocket and missile attack on Israel.
"All these events will happen in three hours, but in the second three hours, Iran will attack U.S. warships in the Persian Gulf as American and European interests will be targeted simultaneously," YNet quoted Assad as saying.
Meanwhile, the U.S. on Wednesday lashed out at China and Russia for vetoing a U.N. Security Council resolution condemning Syria for its brutal crackdown on pro-reform protesters.
Immediately after Tuesday's vote, U.S. Ambassador to the U.N. Susan Rice said the "the courageous people of Syria can now clearly see who on this council supports their yearning for liberty and human rights -- and who does not."
"Those who oppose this resolution and give cover to a brutal regime will have to answer to the Syrian people -- and, indeed, to people across the region who are pursuing the same universal aspirations," she said.
It is estimated that more than 2,000 Syrians have been killed since the anti-Assad protests began in March.