Treasury spokesman Maciej Wewior declined to comment on the report, saying that the official decision had yet to be made.

"We will announce our decision as planned on August 24," he told AFP.

Besides EDF and GDF Suez, there are four other bidders: Spain's Iberdrola, the Czech group EP Holding, Poland's Kulczyk Investment, plus a consortium of Italy's ENEL and Slovakia's Slovenske Elektrarne.

Parkiet said the stake in Enea could fetch 1.2 billion euros (1.5 billion dollars).

In 2009, German power giant RWE withdrew its bid for a majority share in Enea after having been the only candidate.

At the time, RWE said it had decided to drop its non-binding offer because it had decided the deal fell short of market expectations.

In June this year, Polish authorities invited new tenders for the stake in Enea, setting a July 28 deadline.

The Polish treasury controls 60.43 percent of Enea, after having sold a total 16.05 percent of the company's capital on the Warsaw Stock Exchange earlier this year.

Swedish energy group Vattenfall owns 18.7 percent of Enea, a stake it bought in 2008.

Enea is one of four state-owned power companies in Poland.

It claims 16 percent of the country's power market, covering 2.3 million homes in northwest Poland.