BRUSSELS (Reuters) - The European Commission will close its investigation into Chinese bidders in a public tender for a solar park in Romania after the companies withdrew from the process, European Industry Commission Thierry Breton said on Monday.

The Commission launched two investigations on April 3 into whether the Chinese participants benefited excessively from subsidies in bidding for a contract worth about 610 million euros ($658 million).

The first investigated consortium was composed of Romania'sENEVO Group and a subsidiary of LONGi Green Energy Technology Co. The second involves subsidiaries of Chinesestate-owned Shanghai Electric Group Co..

Breton said that the Commission took note of the withdrawal of LONGi Solar and Shanghai Electric from bidding and would therefore close its investigation.

"We are massively investing in the installation of solar panels to decrease our carbon emissions and energy bills - but this should not come at the expense of our energy security, our industrial competitiveness and European jobs," Breton said.

Under the EU foreign subsidies regulation, which has applied since July 2023, companies are obliged to notify the European Commission, which then has to assess whether subsidies allow companies to submit overly advantageous offers.

The Commission also dropped its first investigation into Chinese trainmaker CRRC's involvement in a Bulgarian tender after it withdrew.

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(Reporting by Philip Blenkinsop; Editing by Hugh Lawson)