"The pilots’ error resulted in the collision over the Lipetsk Region, a special commission is now studying the details of the accident, which will particularly determine the extent of responsibility of each of the crews [the Su-34 jet crew is made up of a pilot and a navigator — TASS]," the source said.
The source also added that "the pilots are likely to pay for the damages inflicted."
Earlier on Friday, the Russian REN TV channel reported that two Su-34 fighters collided in the air over the Lipetsk Region due to loss of eye contact, citing their sources.
The crews of the fighter bombers managed to land both jets after the accident.
More about: Russia