While studying the circumstances of the explosion, investigators are focusing on external interference as the main cause. We assume that the explosive device was placed under a concrete block supporting the pipeline and after that there were two short explosions and later a big one. The investigation continues, " Avakov said.
Read also: Explosion on Gas Pipeline "Urengoy-Pomary-Uzhhorod"
"There was a fire, it was big enough, about 300 m of flames. Ignition occurred for a few hours and was eventually extinguished," the Minister added.
Avakov emphasized that "as there are additional backup lines, the gas delivery is not affected, the situation is localized, we continue the study area for additional items."
Prime Minister Arseny Yatseniuk ordered to strengthen security at pipeline installations.
External interference is the main cause of the explosion on "Urengoy-Pomary-Uzhhorod" pipeline.