Medical sources in Khan Sheikhun reported symptoms among the affected including fainting, vomiting and foaming at the mouth.
At least 10 were killed, more than 40 were wounded after two explosions in the metro. A third bomb was defused.
"Unfortunately today, we are witnessing the growth of violent extremism in the world," said Iran's President Rouhani.
'Nowhere is the disproportionate focus on Israel starker and more absurd than in the case of today’s resolution on the occupation of Syria’s Golan.'
"If tonight or tomorrow or in future a similar case were to take place, we will not hesitate to take action against any ballistic threat."
The Syrian Rebels have taken over the eastern side of Damascus and attacked the Russian Embassy.
The IAF allegedly bombed a Hezbollah weapons convoy and Syrian military sites along the Lebanon-Syria border.
Defense Minister Liberman warned the next Syria fired its missiles at Israel, the IAF would wipe out its air defense system.
As to the Russian presence in Syria, Liberman said the last thing Israel wants is tension with Russia.
Iran has been making serious efforts to forge a shiite territorial contiguity from its border all the way to Lebanon.
Israel's Ambassador to Russia was summoned following IAF airstrike, as there were reportedly Russian troops near the strike zone.
The IDF denied the Syrian claim.
Jerusalem residents reported hearing at least two explosions that sounded like Iron Dome missiles taking down incoming rockets.
The Secretary reminded reporters the US "has provided $1.35 billion in assistance to North Korea as encouragement to take a different pathway."
The Syrian dictator's knight in shining armor is Russian President Vladimir Putin.
The momentum now here in Iraq is clearly on the side of the Iraqi Security Forces and the Iraqi people.
Larijani urged Sunni Muslim countries to abandon their reliance on Israel and join up with Iran's war against the Zionist foe.
The two men discussed the situation in Syria, in the context of joint efforts to combat international terrorism, and examined the main areas of bilateral cooperation.
"If the Syrian government requests, we are ready to take action to liberate Golan."
'Victory over the terrorism of ISIS cannot lead to an upsurge in terrorism by Iran and its proxies. We will not exchange terrorism for terrorism.'