MOSCOW (Sputnik) — The bikers are members of the Night Wolves motorcycle club and were set to take part in a Victory Day rally.
"The Polish ambassador to Russia has been summoned to the Russian Foreign Ministry due to an entry ban for a group of Russian bikers," the source told RIA Novosti.
Last spring, the Night Wolves motorcycle club attempted to stage a motocross from Moscow to Berlin to commemorate the 70th anniversary of the end of the Great Patriotic War. The 6,000 km trip had plans to stop at memorials and war cemeteries across western Russia, Belarus, Poland, the Czech Republic, Slovakia, Austria and Germany.
The group ran into trouble after being stopped and turned back at the Polish border, causing a minor diplomatic scandal between Warsaw and Moscow. Some of the bikers managed to get through, going around Poland and ending up in Berlin in time for Victory Day on May 9.