The man entered the premises of a Gillette manufacturing plant and fired at an employee before fleeing, authorities said.
Police later located the suspect and were negotiating with him.
“Everyone has been evacuated and no one was hurt,” regional police spokeswoman Edyta Machnik told public broadcaster Polish Radio.
“Our priority is to detain the man as quickly as possible,” she added.
Police have not disclosed what type of weapon was used, how many shots were fired or the suspect’s possible motive.
Large numbers of officers, including a counterterrorism unit, were deployed to the area, state broadcaster TVP Info reported.
The incident occurred shortly after 7 a.m. local time.
(gs)
Source: IAR, PAP, TVP Info