There are fears for jobs at one of the longest established pharmaceutical plants in the country.
Staff at Schering Plough near Innishannon in Co Cork have been called to a meeting with management at the plant this afternoon.
Some 516 people work at the biotech plant at Brinny - which was established in Ireland in 1972, and into which some €318m has been invested over the years.
The plant's operations involve the production of treatments for hepatitis C and rheumatoid arthritis, along with some newer products.
Sales from the plant exceed €2bn a year, and are exported to 90 countries across the globe.
However, the parent company for Schering Plough merged with another industry giant Merck last year.
A statement from the company is expected later - but not until staff have been briefed at the lunchtime meeting.