Media, citing a source in the Russian defense Ministry, said the cause of the accident under the Deir ez-Zor, which killed Russian “soldiers of fortune”.
According to the source, the incident could have happened due to the attempts of local businessmen, enabled the government to seize Kurdish oil fields. With this purpose, went on the offensive by Pro-government tribal formations in the second echelon were fighters against terrorists of ISIS (an organization banned in Russia).
Under attack Americans who support the Kurds, were those, and others. The source stressed that the Russian command gave orders to seize the Kurdish fields.