The European Commission is set to take Poland to the European Union's top court for not ensuring its national telecoms regulator is free of government pressure, an EU source said on Monday, Reuters reports.

"Poland will be taken to the European Court of Justice over the lack of telecoms regulatory independence," the source said.

At the same time, Luxembourg will be sent an initial warning for not ensuring its domestic telecoms regulator is independent of the Grand Duchy's government, the source who is familiar with the matter said.

The EU's executive arm is due to sign off on the steps on Thursday as part of a monthly round of infringement proceedings against states that break the bloc's laws, Reuters points out.

Under EU rules, national telecoms watchdogs must be independent of governments so they can enforce competition in their markets and face down pressure from powerful incumbents or former state-owned national monopoly operators.