Moscow airspace restrictions divert 22 flights to Nizhny Novgorod backup hub

Temporary restrictions on aircraft acceptance and departure in Moscow overnight forced 22 flights to divert to Chkalov Airport, the designated backup for the Moscow aviation hub. The cause of the restrictions is not stated, leaving uncertainty over whether this is a security incident, weather, or technical issue. The event highlights reliance on backup infrastructure and potential cascading disruption to air travel.