components, into his face (see Zelyonka attack). He said he had lost 80 percent of the sight in his right eye. He also said that his doctor believed there was a second corrosive substance in the liquid and that "there is hope" the lost eyesight would be restored. He also alleged that the attacker was Aleksandr Petrunko, a man he claimed had ties with State Duma deputy speaker Pyotr Olegovich Tolstoy. Navalny accused the Kremlin of orchestrating the attack. Another incident occurred in July 2019, when Navalny was arrested and imprisoned. On 28 July, he was hospitalized with severe damage to his eyes and skin. At the hospital, he was diagnosed with an allergic reaction, although this diagnosis was disputed by Anastasia Vasilieva, one of his personal doctors. Vasilieva questioned the diagnosis and suggested the possibility that Navalny's condition was the result of "the damaging effects of undetermined chemicals". On 29 July 2019, Navalny was discharged from hospital and taken back to prison, despite the objections of his personal physician who questioned the hospital's motives. In August 2020, in the days leading up to the poisoning, Navalny had been publishing videos on his YouTube channel in which he expressed support for the pro-democracy 2020 Belarusian protests, which were triggered by the heavily contested 2020 Belarusian presidential election. Navalny had also written that the kind of 'revolution' that was taking place in neighbouring Belarus would soon happen in Russia. Local news site Tayga.Info reported that during his Siberia trip, Navalny had been carrying out an investigation, as well as meeting local candidates and volunteers. When asked if Navalny were preparing an exposé shortly before he became violently ill, Navalny ally Lyubov Sobol stated "I can't reveal all the details, but Navalny was on a work trip. He wasn't relaxing in the regions". The video investigation was later published by Navalny's team on 31 August. It is assumed that Navalny was poisoned in a politically motivated attack as 'punishment' for his opposition work. Other prominent Russians including activists, journalists and former spies have suffered poisoning attacks in recent decades such as Alexander Litvinenko in 2006 and Sergei Skripal in 2018, both in the United Kingdom. In the former instance, the poison was administered by being placed in Litvinenko's tea. British authorities blamed both attacks on Russian intelligence agencies and an inquiry concluded that Russian President Vladimir Putin had "probably" approved Litvinenko's killing.