Tehran is closely monitoring the hostilities in Nagorno-Karabakh, and it will not tolerate aggression along its borders and on its territory, Iranian Ambassador to Russia Kazem Jalali told Sputnik in an interview.

Iranian media reported Tuesday that a combat drone had fallen on Iranian border area from the Karabakh conflict zone. Earlier, the Iranian Foreign Ministry stated that eight shells had fallen on homes in the country’s border region due to fighting in Karabakh.

"The Islamic Republic of Iran is thoroughly monitoring activities in the border regions of our country. In this regard, as we declare inadmissible aggression by any of the warring sides on our territory, we seriously warn them of the need to be cautious," Jalali went on to say.

Tehran maintains close contact with all the sides to the conflict, the ambassador stressed.

"The Islamic Republic of Iran will not tolerate aggression along its borders and on its territory. During the recent events enfolding between Armenia and Azerbaijan, we told both sides that anyone violating this principle will be fully rejected," the diplomat said.

According to him, Iran has achieved "self-sustainability" and even has "export potential" in some areas of the defense sector.

"If we feel it is needed, we will certainly implement the needed retaliatory measures," added the head of the Iranian diplomatic mission to Russia.