MOSCOW, April 13. /TASS/. The Ka-29 military helicopter, which lost contact with the air traffic control, has crashed in the waters of the Baltic Sea in the Kaliningrad Region, the emergencies services told TASS on Friday.

"According to preliminary data, the helicopter crashed into the sea," a source said.

Two pilots from the manufacturing plant died, the Baltic Fleet’s press service said.

The helicopter went missing when performing a night training flight at 23.30 Moscow Time on Thursday. The flight was made in normal weather conditions.

A search operation at the crash scene is underway.