Iran's Islamic Revolution Guards Corps (IRGC) says those who have aided and abetted the Daesh terror group are accomplices in twin attacks claimed by the Takfiri group in the Iranian capital.

In a Wednesday statement, the IRGC condemned the twin terror attacks in Tehran and blamed sponsors of the Takfiri group for the attacks.   

The IRGC said the fact that the terrorist attacks were carried out by Daesh just days after US President Donald Trump's meeting with "the rulers of a regional reactionary regime," which has been supporting Takfiri terrorists, indicates that “they have a hand in the bestial attacks.”

The IRGC said it would retaliate for innocent bloodshed in the attacks and pledged to strongly safeguard the country’s national security.

Earlier on Wednesday, gunmen stormed Iran’s Parliament (Majlis) and the mausoleum of the late founder of the Islamic Republic Imam Khomeini in two coordinated attacks.

Twelve people were killed and over 40 others wounded in the assaults.

Separately, Brigadier General Hossein Salami, the IRGC's second-in-command (pictured below), vowed that the IRGC would avenge the attacks.

“We will remain steadfast in fighting terrorists and we will surely take revenge on terrorists, their affiliates and their supporters for the blood of the martyrs of today’s two terrorist attacks,” Salami said.

After the attacks ended, the Interior Ministry issued a statement, elaborating on the terror incidents. According to the statement, the first terror group, comprised of two people, entered the mausoleum at around 10:30 a.m. local time (0600 GMT). The first terrorist blew up his explosives, but the second was killed during firefight with security forces.   

Concurrently with the attack at the mausoleum, the second terror team made up of four terrorists sought to enter the administrative building of the parliament but were confronted by security forces, the statement said.

The ministry added that one terrorist blew his explosives up while the three others were killed in shootouts during clashes with security forces as they were seeking to reach upper floors of the parliament building.