イパチェフ館
During the imperial family's imprisonment in late June, Pyotr Voykov and Alexander Beloborodov, president of the Ural Regional Soviet, directed the smuggling of letters written in French to the Ipatiev House. These claimed to be by a monarchist officer seeking to rescue the family, but were composed at the behest of the Cheka. These fabricated letters, along with the Romanov responses to them (written on either blank spaces or the envelopes), provided the Central Executive Committee (CEC) in Moscow with further justification to 'liquidate' the imperial family. Yurovsky later observed that, by responding to the faked letters, Nicholas "had fallen into a hasty plan by us to trap him". On 13 July, across the road from the Ipatiev House, a demonstration of Red Army soldiers, Socialist Revolutionaries, and anarchists was staged on Voznesensky Square, demanding the dismissal of the Yekaterinburg Soviet and the transfer of control of the city to them. This rebellion was violently suppressed by a detachment of Red Guards led by Peter Ermakov, which opened fire on the protesters, all within earshot of the tsar and tsarina's bedroom window. The authorities exploited the incident as a monarchist-led rebellion that threatened the security of the captives at the Ipatiev House.