There are police patrols with dogs in some Metro Stations (Okhotny Ryad, Ploshad Revolyutsii, Teatralnaya Ploshad) and in the underground crossings adjusting them.
In addition, detachments of three Interior Troops soldiers are in some trains. Every soldier has a gas-mask. The police equipped with compact metal detectors, control exits and entrances to the Metro. Policemen stop some passengers and check their IDs and sometimes luggage. People of Caucasian appearance are stopped most of all.
In general, it is quiet in Moscow Metro. There are not many passengers because of weekend.