WARSAW, April 29 (RAPSI) – Polish prosecutors have opened a criminal case against unidentified persons suspected of training Ukrainian nationalists who took part in mass riots in Ukrainian capital, Przemyslaw Nowak, spokesman for the District Prosecutor’s Office in Warsaw, told RIA Novosti on Tuesday.

According to Nowak, Polish law enforcement officials believe that Polish and foreign nationals were recruited for a foreign military organization no later than March 4.

They are investigating the case and planning to question witnesses.

In early March, Russia’s Federation Council Deputy Speaker Yury Vorobyov claimed that the Untied States financed the training of Maidan militants. He said that, according to information available to Russian authorities, “The training of the Kiev Maidan militants in Lithuania and Poland was financed by the United States.”

At that time, a spokesperson of the Polish Foreign Ministry refused to comment on the accusations, which he charecterized as groundless media bashing.

It is believed that Maidan activists received intensive training in crowd management, person recognition, combat tactics, command skills, behavior in crisis situations, protection against gases used by police, erecting barricades, and especially firearms, including the handling of sniper rifles.

Ukraine underwent a regime change resembling a military coup on February 22. The country’s parliament ousted President Viktor Yanukovych, changed the constitution and scheduled an early presidential election for May 25.

Moscow has repeatedly questioned the legitimacy of these actions and said that the legitimacy of the presidential election will depend on a number of conditions, including transparency and respect for the interests of Ukrainian regions.