"The Prosecutor's Office of the Gorny District organized an inspection on the fact of a traffic accident that occurred on the night of August 2 on the 98th km of the Vilyui federal highway," the press service of the regional prosecutor's office quoted TASS as saying.
According to preliminary data, the female driver lost control and drove off the road.
The woman, her husband and their son born in 2004 died, two more children were hospitalized.
Earlier, as a result of a collision of two cars in Voronezh, four people were injured, including two children.