...largest telecoms group, is among the bidders, a Czech newspaper reported on Tuesday.
The daily Hospodarske Noviny quoted sources close to the talks as saying Slovak-Czech financial investor Penta was also interested in acquiring unlisted GTS, which has not officially announced it is for sale.
The Czech telecommunications group's unit, GTS Novera, is the second largest telecoms provider for business customers in the country.
GTS Novera had no comment.
It was formed in 2005 through the merger of operators GTS CZECH and Aliatel, and has since acquired operators Contactel, Nextra and Telenor Networks.