LONDON (REUTERS) - GlaxoSmithKline Plc is facing a criminal investigation in Poland for allegedly bribing doctors to promote its asthma drug Seretide, BBC Panorama reported on Sunday.

The BBC reported that 11 doctors and a GSK regional manager have been charged over alleged corruption between 2010 and 2012.

"The investigation found evidence of inappropriate communication in contravention of GSK policy by a single employee. The employee concerned was reprimanded and disciplined as a result," the drugmaker was quoted as saying.

According to the BBC, one doctor has admitted guilt and has been fined and given a suspended sentence.

GSK, Britain's biggest drugmaker, was accused by Chinese authorities in July of funnelling up to 3 billion yuan (S$603 million) to doctors and officials to encourage them to use its medicines in a case that rocked the pharmaceuticals industry.