Islamic State terrorist group has called for more terror attacks in the US, Europe, Russia and Australia during the holy month of Ramadan.

As AP reported, the audio message distributed on Monday was believed to have been issued by Islamic State's official spokesman Abi al-Hassan al-Muhajer. 

The spokesman called for more bombings in Iran, saying the country is “weaker than a spider's web.” 

On June 7, gunmen and suicide bombers carried out attacks on Iran’s parliament and the mausoleum of revolutionary founder Ruhollah Khomeini in capital city Tehran, killing 17 and injuring over 60  people.