TEHRAN - A senior Iranian commander said Thursday that Iran successfully test-fired indigenous advanced air defense system dubbed "Mersad" which was launched by a drone aircraft, the semi-official ISNA news agency reported.

Related readings:  Iran begins 3rd day of air defense drill  Iran starts 'biggest' air defense war games  Commander: Iran to test own S-300 missile  Israeli PM asks US for military threat on Iran

"Mersad medium-range air defense system was successfully test-fired in one of the rifle ranges of the country's air defense," the spokesman of the drill Brigadier General Hamid Arjangi was quoted as saying.

"It is a completely indigenous digital system and is able to deal with electronic wars. It can intercept and annihilate modern aircraft in low and high altitudes and connect to radar network," said Arjangi.

Also, Iran's radar network managed to locate small-scale stealth radar drones of the hypothetical enemy on the third day of drill Thursday, said the commander according to ISNA.

Iran launched one of its largest nationwide air defense drills on Tuesday, assuming possible attacks on its public or nuclear establishments. Aerial defense units from the army and the Islamic Revolution Guards Corps (IRGC) are taking part in the three-stage, five-day defense maneuvers dubbed "Modafean Aseman Velayat 3" (the Guardians of Islamic Skies).