After the explosions on the territory of Akyar (Sevastopol), some terminals of the Russian payment system Mir stopped working. This was reported by a correspondent of Crimea.Realities.
When using a Mir bank card, the system responds that the host is unavailable and the operation is rejected. Perhaps this applies to terminals that operate at a certain frequency.
According to store clerks, mobile communications at the terminals are muted for security reasons.