Riyadh denies any role in the Tehran attack and says there is no evidence to suggest its involvement.
IS affiliate Khorasan Province consists mainly of disgruntled former Taliban and other insurgents from South and Central Asia.
Twelve dead and 30 wounded in twin assaults in the heart of Tehran.
The latest military action will pile more pressure on the jihadists whose self-declared caliphate is in retreat across Syria and Iraq.
Erdogan called up the leaders of Qatar, Kuwait, Saudi Arabia and Russia.
Families are fleeing the city ahead of an expected all-out attack by the Kurdish-led Syrian Democratic Forces.
Social media users also threatened to brick the windows of the Muslim's flat.
From WhatsApp to Telegram: Encrypted applications are once again under the spotlight.
US defence chief James Mattis' comments came after 3 June London attacks that killed at least seven people.
At least 37 people died, mostly from smoke inhalation, while the gunman fled and later killed himself.
SDF has been engaged in fierce fighting with IS militants along the southern bank of the Euphrates River
Nadia Murad was captured by Islamic State militants in 2014.
Black Crows shows women and children living under the jihadists and tackles subjects such as mass murder and rape.
Brigadier General Restituto said 960 civilians had been rescued and an estimated 1,000 residents remained trapped in the city.
People flee western Mosul's al-Zanjili district with whatever possessions they can carry during Iraqi forces' assault on last Isis-held enclave.
Moscow's ministry of defence said Islamic State militant hideouts were targeted in the cruise missile strikes.
Tens of thousands of people have fled Marawi since 23 May, when militants seized part of the city, taking Christians hostage.
"I did not expect so many people to come and hug me, but it was the best thing I've ever done".
Militants linked to Islamic State putting up fierce resistance in street battles
Police said the six men were arrested from four states between 23 and 25 May.
Philippines president tells military personnel implementing martial law they have his full support.
President Abdel-Fattah al-Sisi pledges he will not hesitate to launch more attacks on Islamist targets.