This is stated on the website of the department.

"At present ... the amount of damage caused is being established, other measures are being taken to establish the causes and circumstances of what happened," the statement says.

According to preliminary data, the tail engine failed in the helicopter after takeoff from the Novo-Portovskoye field.

Earlier it was reported that the Mi-8 helicopter, on board of which there were 22 shift workers and three crew members, made a hard landing on the Yamal Peninsula.