Iran will definitely take revenge on the terrorists that killed Islamic Revolution Guard Corps (IRGC) members on Khash-Zahedan Road, Major-General Mohammad-Ali Jafari has said, IRNA reports.

"If Pakistan doesn't do its duties in fighting terrorism, Iran will fight the terrorist groups organized by regional and extra regional intelligence services," said Major-General Mohammad-Ali Jafari on the sidelines of the ceremony to commemorate the martyrs of the attack on Saturday.

Suicide attack on a bus carrying the Islamic Republic Guard Corps (IRGC) personnel killed 27 and wounded 13 in southeastern Iran on Wednesday.

A terrorist group called Jaish al-Adl, affiliated to Al-Qaida, claimed responsibility of the incident.

General Jafari said, "Attendance of people in the 40th anniversary of the Islamic Revolution and their loyalty to the Revolution disappointed the enemies and made them carry out a suicide attack by their mercenaries and terrorists.

"The sworn enemies' grudge against the Islamic Revolution shows that Iranian people are treading the right path."