The Tsar was threatened with being incarcerated at the Fortress on his return from Mogilev to Tsarskoe Selo on March 8 ( J ) ; .
Tsar was placed under house arrest .
The Tsar was threatened with being incarcerated at the Fortress on his return from Mogilev to Tsarskoe Selo on March 8 ( J ) ; but he was placed under house arrest .