Germany 's carbon dioxide emissions registry remains closed, and it's still unclear how long the closure will last, a spokeswoman for the Deutsche Emissionshandelsstelle told Dow Jones Newswires Friday.

The registry remains closed as the German authority is awaiting feedback from the European Commission on its security measures for the E.U. Emissions Trade Scheme, known as ETS, spokeswoman Julie Steinen said.

"We submitted the report on our registry's security Wednesday and are now awaiting feedback," she said.

She added that the German registry expects the Commission will give the green light to reopen the registry after examining the report.

Steinen also said she couldn't yet confirm that some of the CO2 certificates that were reported stolen in the Czech Republic have been found in the German registry.

The Czech registry said late Thursday that registry officials in Germany and Estonia have confirmed they together have located 610,000 of the 1.3 million allowances stolen last week.

Europe 's much-vaunted market in trading carbon dioxide emissions suffered a serious setback when one of the registries that makes the trade possible said it would be shut for at least six weeks as the damage from a multi million dollar fraud spreads.

The whole system in trading carbon dioxide on a spot market, a key element in Europe 's fight against global warming, has been effectively closed since Jan. 19 after hackers stole emissions allowances in the Czech Republic , Austria and Greece .

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