"We are talking about materials that confirm crimes against humanity and which will be the subject of analysis by the U.S. senators and congressmen," he wrote.
"The collected materials could form the basis of an evidence base to hold the aggressor criminally liable," Lubkivskyi wrote.
Initially the report was to be delivered to the United States by Head of the SBU Valentyn Nalyvaichenko, but on June 14 Lubkivskyi wrote on his Facebook page that the Presidential Administration did not let Nalyvaichenko go due to the need of his questioning by the Prosecutor General's Office.
The subject of Nalyvaichenko's interrogation was to be his statement dated June 12 that former deputy general prosecutor received "criminal proceeds" from the BRSM-Nafta oil depot near Vasylkiv, where the fire had been raging since early last week, and who was co-owner of the depot.
On Monday before the interrogation, Nalyvaichenko named the official - former Deputy of Prosecutor General Vitalii Yarema Anatolii Danylenko. The head of the SBU also announced his detention on Tuesday.