About 500 people were evacuated from two railway stations in Moscow on Friday after police were tipped off about bombs being planted, RIA news agency cited an emergency services source as saying.
RIA reported that Paveletsky and Kursky stations had been evacuated and said later that no bomb was found at Kursky after sniffer dogs searched the station.
It did not say what had happened at Paveletsky station. Police in Moscow declined immediate comment.
It comes after Europe ushered in the New Year with heightened security fears as German police evacuated two train stations in Munich, citing a tip about a planned suicide bomb attack, and Belgium held three people over an alleged plot.
Security forces in many capitals were on raised alert after a year of militant attacks, including an attack on Paris in November that killed 130 and was claimed by Islamic State (IS).
Soldiers were on the streets of the French capital, and police forces in London, Madrid, Berlin and Istanbul increased their presence as Europeans turned out to celebrate the arrival of 2016.