On 26 November, the FSB published its detailed chronology of the events of 25 November on its website.[1] The chronology indicated that the Ukrainian vessels failed to follow the advance notification procedures for passage through the Kerch Strait and that Russia did not contest the 2003 Treaty right to freedom of navigation through the strait. Foreign Minister Sergey Lavrov said on the next day that Ukraine had violated international legal norms by failing to obtain authorisation for its vessels.[2] Deputy chairman of the State Duma Pyotr Tolstoy warned of the danger of a war.[102]