A US spy drone downed by Iran had its tracking equipment turned off, contravening aviation rules, Iran’s Revolutionary Guard Corps (IRGC) has said.

“The drone took off from a US base in the southern Persian Gulf,” according to a statement by the elite unit. While in the air, the US allegedly attempted to make the drone appear invisible to radar.

It had turned off all its identifying equipment in violation of aviation rules and was moving in full secrecy.

Earlier, Tehran said its air defenses had shot down a US RQ-4 Global Hawk reconnaissance drone overnight, after it illegally entered Iranian airspace over southern Iran. (RT)