Fire has destroyed a wooden church built on the site where the remains of Russia's last tsar, Nicholas II, and his family were found in the Urals.
Firefighters managed to stop the blaze spreading to other parts of the Ganina Yama monastery near Yekaterinburg.
Fire officials believe candles or stoves inside the church may have started the fire.
The monastery was founded in 2000 at the old mine where the bodies were dumped during the Revolution.
The alarm was raised at 0720 local time on Monday (0120 GMT), and 45 firefighters were sent to tackle the blaze.
"Candles were used in the church which had stove heating," emergencies officials told Russia's Itar-Tass news agency.
"It is not ruled out that this became the cause of the fire."