The siege was now headed by voyevoda I.Mescherinov. The rebels had been successfully defending themselves until their betrayal by a monk named Feoktist, who showed the Streltsy an unprotected window of the monastery’s White Tower. This brought about the end of the uprising, which was suppressed with incredible brutality in January 1676. Only sixty rebels out of five hundred survived the seizure of the monastery. Large supplies of food were discovered stored in the monastery which would have been sufficient to withstand siege for several more years. Almost all of the remaining insurgents were later executed.