Ukrainian law enforcement services will soon inform President Petro Poroshenko of the results of their investigation into a fire that broke out at an oil depot near Kyiv, the president's press secretary Sviatoslav Tseholko said on his Facebook account on Tuesday.

"Within the next few hours, law enforcement agencies will have to report the results of their inquiry into the cause of this catastrophe. A theory suggesting a terrorist attack has not been confirmed as of yet," he said.