Iran's Foreign Ministry said "No one can force Iran to do anything" and it would stay in Syria as long as it was welcome.
Secretary of State Mike Pompeo accused Tehran of using Iran deal funds to back the Lebanese Shiite Muslim Hezbollah, as well as the jihadi Sunni Muslim groups.
Putin said that a new political phase will follow “the significant victories and success of the Syrian army.”
In his second known trip since 2011, Syrian President Bashar al-Assad told Russian President Vladimir Putin that "stability is improving."
A majority of Russians say escalating tensions in Syria with the United States and other allies in the West could spark World War III.
Russian warships and submarines don't only target ISIS and other Syrian insurgents, but also provide a cover against NATO's southern flank in Europe.
China's envoy to Syria said he saw "huge space" to expand support for Russia and its role in Syria's seven-year civil war.
Iran says that the U.S. and Israel are attacking Syria in order to promote "terrorists" struggling to overthrow Assad.
Like Israel, Saudi Arabia was one of the few nations to welcome Trump's decision to withdraw from the Iran nuclear deal.
The White House condemned Iran’s rocket attacks but failed to mention Israel’s strikes on military targets in Syria.
“The (Israel Defense Forces) sees this Iranian attack on Israel with severity,” a spokesperson for the military said. There were reports that Israel targeted Iranian positions in Syria in response.
The Israeli prime minister is in Moscow to discuss ties with Russia and celebrate the defeat of Nazi Germany.
Hours after the Israeli military urged citizens to take shelter and President Donald Trump left the Iran deal, new strikes were reported in Syria.
Israel deployed defense systems, and troops “are on high alert for an attack,” the Israel Defense Forces said in a statement.
President Donald Trump has said the U.S. will leave a historic 2015 nuclear deal with Iran, a potentially destabilizing decision for the region.
An Israeli minister and Cabinet member said Syrian President Bashar al-Assad's continued support for Iran "will spell his end."
In order for Russia to extend its influence in Syria to Lebanon, it will have to mediate a greater conflict between Iran and Israel.
Engine trouble is currently believed to have caused the deadly crash at sea.
A man believed to have helped oversee the creation of ISIS’s global caliphate says he hasn't seen Abu Bakr al-Baghdadi since July 2017.
North Korea is an ally of Syria, Cuba and other fellow enemies of U.S. foreign policy, but peace may be on the horizon.
As the Syrian military and its allies advance on the ISIS' last stronghold south of Damascus, the jihadis' tactics grow more bloody.
"The one who must leave is the U.S., not the Islamic Republic. We are from this region: the Persian Gulf is our home; West Asia is our home," Khamenei said.
The Syrian Observatory for Human Rights believed Israel was likely responsible for the attack.
Syrian military positions in southern Hama were reportedly attacked as international tensions mounted.
Syrians must return home and prove property ownership by May 11.