Exploding goggles were delivered to Russian soldiers in a suspected act of sabotage, the Kremlin’s state media reported.

The Skyzone Cobra X v4 headsets — used to fly deadly FPV drones — were rigged to detonate when turned on, according to Igor Potapov, a spokesman for JSC NPP, a firm supplying electronic warfare equipment to the Russian military.

“When the batch was opened, packaged plastic explosives were found in all of these products,” he told the Tass state news agency.

He said the goggles had been donated as part of a humanitarian aid package by a person known as “Roman”.