Russia's unsuccessful attempts to help Britain to investigate the poisoning of Sergei and Yulia Skripaly indicate that London has some unknown information on the incident in Salisbury. This was stated by Sergei Lavrov during a speech at a meeting of the UN Security Council. "Britain has stubbornly and repeatedly rejected cooperation with Russia. The question arises: if they do not want to cooperate, then there is something to hide ... The way events develop, gives grounds to believe that nothing can be ruled out, including provocations with chemical weapons, "Lavrov said.. The article is supplemented.