Syria admitted for the first time that it has chemical weapons and Foreign Ministry spokesman Jihad Makdissi said his country is willing to use the stockpile against a foreign invader.
The warning came as fighting continued between Syrian opposition and forces loyal to President Bashar Assad.
World leaders are concerned about the status of Syria's arsenal. Israel is most worried about these chemical weapons falling into the wrong hands.
An Israeli government spokesman revealed that Israeli and American leaders have discussed how to manage the Syrian collapse and control of its weapons stockpile.
Israel is the prime target of the Syrian threat. The Netanyahu government has considered securing the chemical weapons so they don't fall into the hands of a terrorist group, such as Hezbollah in Lebanon.
"Can you imagine Hezbollah, the people who are conducting with Iran all these terror attacks around the world, can you imagine that they would have chemical weapons?" Israeli Prime Minister Benjamin Netanyahu told Fox News Sunday.
"It's is like al Qaeda having chemical weapons," he continued. "It's something that is not acceptable to us and not acceptable to the United States and to any peaceable country in the world."
Meanwhile, with the death toll in Syria getting close to 20,000, European leaders are considering sanctions as a way to stop the Assad regime.
"We have to impose more sanctions," said Erato Kozakou-Marcoullis, foreign affairs minister of Cyprus. "And this is our position. We have to combine sanctions with political pressure."
European Union Foreign Affairs Representative Catherine Ashton agreed.
"It is important to carry on with sanctions," she said. "It is very important to carry on with the political process."
Meanwhile, United Nations observers are leaving Syria -- one more sign of the dramatic U.N. failure to change Syria's bloody course.