Israel said it had attacked almost all of Iran's military infrastructure in Syria on May 10 after Iranian forces fired rockets at Israeli-held territory for the first time. Oil prices rose while Israel's currency and stock markets gained.
There were no casualties on the Israeli side.
Qassemi said the terror groups were in fact "proxies" waging war on behalf of the US, Israel and their regional allies.
Israel said 20 rockets, either Fajr or Grad type, were fired from Syria at its forces in the occupied Golan Heights at around midnight.
That barrage came soon after President Donald J. Trump's announcement Tuesday that he is ending the United States' participation in the Iran nuclear deal.
He said he was not fearful but that many of those close to him were.
The claim of an Iranian attack "is a lie", said Mohammad Javad Jamali Nobandegani, a member of the Iranian parliament's National Security & Foreign Policy Commission, according to the legislature's website.More news: NHC eyeing tropical disturbance in the Gulf of Mexico
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Not only does Israel say it intercepted a number of the Iranian missiles, it says the other missiles failed to reach their target and sputtered out while still in Syria.
United Nations:UN Secretary-General Antonio Guterres called on Syria and Israel to halt all hostile acts in light of their recent conflicts of rocket firing and missile strikes, his spokesperson said.
Israeli Defense Minister Avigdor Liberman sought to calm concerns that the major escalation along a highly volatile frontier was the opening salvo in a wider war.
"This is what we have done and this is what we will continue to do", Netanyahu said in the statement. "We have no desire to escalate". We'll see if they grasp that, or if their seething hatred of America, of Israel and of Jews prompts them to take aggressive actions that will invite a military response by their adversaries.
Israel and its USA ally believe the Lebanese Shiite militia is amassing weapons on Lebanon's southern border in preparation for a new war after a deadly conflict with Israel in 2006.
They also see a rare chance for Iran to hold the moral high ground.
In a rare public gesture by an Arab government, Bahrain expressed its support for the Israeli air raids. "We strongly support Israel's right to defend itself".
"The fundamental reason why Syria has become a battleground is because of the Islamic Republic's [of Iran] declared ideology and strategy since 1979 of fighting Israel and its supporters", said Amir Toumaj, a research analyst at the Foundation for Defence of Democracies, which takes a hawkish stance on Iran. Iran vowed revenge and Israel has been warning for weeks that it was expecting an Iranian attack. It also said it destroyed several Syrian air-defence systems after coming under heavy fire and that none of its warplanes was hit. Israel responded with a blistering wave of missile strikes early Thursday.
Due to these strikes Soleimani had much less military hardware than he had planned to carry out the retaliatory strike against Israel and used what he had left before Israeli carried out airstrikes against the remaining weapons.