"Moscow decisively condemns such terrorist attacks," Kremlin Spokesman Dmitry Peskov said on Wednesday, according to AFP.
He added that the continuation of a series of terror attacks again underlines the need for coordinated actions in the fight against terrorist groups, including Daesh.
The terrorist attack on the Iranian Parliament and the police siege of the building finished in the afternoon. All four gunmen have been killed in the exchange of gunfire.
In another attack on the same day, a group of terrorists opened fire at several people in the mausoleum of Imam Khomeini, the late founder of the Islamic Republic, south of Tehran.
According to officials, 12 people have been killed and 42 others were wounded in the two incidents.