Iran launches missiles into eastern Syria

The Latest: Truce collapses in Syria's south amid offensive

In retaliation for the two terrorist attacks, Iran's Islamic Revolution Guards Corps (IRCG) fired mid-range missiles hitting ISIL centers in Syria's Deir Ezzur, the IRGC said in a statement issued on Sunday.

"Based on credible information, the missile operation against Daesh has been successful", Revolutionary Guards spokesman General Ramezan Sharif said on the elite force's Sepahnews website, using an Arabic acronym for IS.

The missile attack was the first by Iran outside its own territory in 30 years, since the Iran-Iraq war of 1980-88, media in the Islamic republic has reported.

Iran boasted of the strike throughout the weekend, with military officials declaring Iran a top missile power capable of fighting all military forces in the region, including the United States.

Iran vowed quick revenge after ISIS suicide bombers and gunmen stormed the parliament and the mausoleum of Imam Khomeini on June 7, killing 18 and injuring at least 56. The U.S. recently deployed a truck-mounted missile system into Syria as Assad's forces cut off the advance of America-backed rebels along the Iraqi border. It is more likely to have been a warning to the enemies of the Iranian Regime; Israel, Saudi Arabia, and the US.

"It was necessary that Iran gave such response to the IS after their recent terror attacks in Tehran".

Iraqi and Syrian forces met at a crossing point northeast of Tanf, a strategic Syrian border crossing with Iraq on the Baghdad-Damascus highway, where USA troops and Syrian opposition fighters are based, a Syrian general told the pro-government al-Ikhbariya TV channel. "They say they are firing at the same people who planned the attacks in Tehran but it also bolsters the Syrian army effort right now".

"Iran's missile capability protects its citizens in lawful self-defense", the minister said on his Twitter account on Monday following the country's missile attack against Takfiri terrorists' positions in eastern Syria.

But the missiles sent a message to more than just the extremists in Iraq and Syria, Sharif told state television in a telephone interview.

US Secretary of State Rex Tillerson said the $110 billion (100 billion euro) deal was aimed at helping the kingdom deal with "malign Iranian influence".