Prosecutors in Poland are investigating allegations that a U.S. medical equipment company offered bribes to hospital officials across the country in order to secure deals.

Leszek Golawski, prosecutor in the southern city of Katowice, said Monday that dozens of private apartments and offices have been searched in recent months for evidence of allegations that between 2003-06 employees of the Polish branch of Stryker Corp. offered bribes to hospital heads to win tenders worth hundreds of thousands of zlotys.

There was no immediate comment from Stryker Corp. in Poland.