India’s antitrust body on Thursday launched raids against two top domestic sellers of online retail giant Inc over accusations of having violated competition laws, reported Reuters.

Indian retailers have long asserted that Amazon’s platform largely benefits a few big sellers, with the firm engaging in predatory pricing that harms their businesses.

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However, the company says it complies with all Indian laws.

The two sellers were Cloudtail and Appario Retail, but the exact nature of the purported violations prompting the raids was not immediately clear, reported Reuters. The raids are being conducted by the Competition Commission of India (CCI).

Amazon owns an indirect equity stake in both firms. Raids carried out in New Delhi and Bangalore were related to CCI’s investigation ordered in January 2020.

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In that case, Amazon and Walmart’s Flipkart were accused of anti-competitive practices such as promoting preferred sellers on websites and giving priority to listings by some sellers. The companies deny the accusations and the antitrust investigation continues.

Amazon has earlier said it “does not give preferential treatment to any seller on its marketplace,” and “treats all sellers in a fair, transparent, and non-discriminatory manner”.

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According to an extensive investigation last year by Reuters, based on Amazon documents, the e-commerce giant had given preferential treatment for years to a small group of sellers, including Cloudtail, and used them to bypass Indian laws.

The report found that Amazon had helped a small number of sellers prosper on its platform for years, with discounted fees and helped Cloudtail sign special deals with big technology companies.

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The antitrust body told a court that the Reuters report supported evidence it had received against Amazon.

In August 2021, Amazon and Cloudtail agreed that the latter would cease to be a seller from May 2022.

India is an important market for Amazon and it has invested over $6.5 billion but it is also one where it has faced regulatory challenges, including tighter norms for foreign e-commerce companies.