Moscow Mayor Sergei Sobyanin has ordered an increase in the number of sniffer dogs patrolling the metro, a year after suicide bombings hit two of its stations.
The number of police units with sniffer dogs will be increased to 250, a source in the City Hall told RIA Novosti on Wednesday.
The suicide attacks on two Moscow metro stations on March 29, 2010, left 40 dead and dozens injured.
