President Rayeesi made the remarks during a phone call with his Azeri counterpart Ilham Aliyev late Saturday. The conversation came a day after the Baku's embassy in Tehran was the target of a deadly raid.

During the telephone call, Rayeesi conveyed condolences of the Iranian government and nation to the Azeri head of state.

He added that the friendly and brotherly relations between Iran and Azerbaijan are based on indivisible cultural and historical connections.

"The governments of Iran and Azerbaijan will not allow the mutual relations to be influenced by the two nations' ill-wishers," the Iranian chief executive noted.

The president affirmed that the relevant Iranian government bodies are investigating the various aspects of the tragic incident.

For his part, the Azeri president expressed gratitude to Rayeesi for his sympathy and condoling with the Azeri government and people over the incident.

"This was an unexpected crime," Aliyev said, adding, "However, the two countries' cooperation in this issue should be such that nobody would be allowed to use such incidents to disrupt the two countries' friendly relations."

A guard has been killed and two others wounded in an attack on Azerbaijan’s Embassy in Iran on Friday. The attacker broke through the guard post, killing the head of security and injuring two others with a Kalashnikov assault rifle.

Police in Tehran announced they have arrested the assailant.

Iranian Foreign Minister Hossein Amir Abdollahian has said that the enemies of the two countries should not be allowed to take advantage of the tragic incident which the top diplomat noted was not an act of terrorism.

He added the two countries’ security bodies can probe the incident in close cooperation to clarify its various aspects.

The gunman has said in an interview with the Islamic Republic of Iran Broadcasting (IRIB) that he only wanted to “save his wife".

“She must be able to leave the embassy of her own will, and if she doesn’t want to live with me, I’ll help her get her passport, and she’ll be free to go,” he claimed, under the apparent assumption that her wife was in the embassy.

Asked whether that was the only motive he had, he noted, “Yes, I did it to save her.”