This is reported by TASS with reference to a source in aviation circles.

“The Boeing-777 of the Moscow - Khabarovsk flight returned to the Sheremetyevo airport, from where it took off, after the engine malfunction sensor was triggered,” he said.

The landing took place normally, there were no casualties. 

The reasons for what happened are being investigated.

In December, it was reported that a plane flying from Moscow to Krasnodar landed due to a depressurization sensor.