German and Polish police have arrested 10 people in a cross-border operation targeting suspected smugglers of steroids.

German police say more than 200 officers took part in raids in more than 50 buildings in cities in Germany and in the Polish port city of Gdansk.

Police say the steroids had been distributed among body builders and insist that there was no indication the drugs were to be used by participants in other sports.

Some information for this report was provided by AP and Reuters.