Amazon.com Inc. and Walmart Inc.-owned Flipkart Online Services Pvt. Ltd. are unlikely to fully cooperate in an antitrust study by the Indian government over worries their trade secrets will be revealed, Reuters reported May 28, citing sources with direct knowledge of the matter.

According to the report, the e-commerce companies will likely withhold information in a "fact-finding" survey distributed by the Competition Commission of India to online businesses operating in the country. The document reportedly contains 88 questions and asks for information about volunteer pricing strategies and identities of top-selling vendors, among other topics.

Amazon and Flipkart are unlikely to answer the questions in full to avoid disclosing sensitive information, Reuters said.

The companies did not immediately respond to requests for comment from S&P Global Market Intelligence.

The development comes around four months after India's Ministry of Commerce and Industry implemented new rules for e-commerce companies, including prohibiting them to sell merchandise from companies in which they hold an equity stake and barring them from making exclusive deals with select sellers.

The new rules followed complaints from Indian retailers and traders, who accused e-commerce companies of creating an unequal playing field through aggressive pricing and domineering.

Flipkart and Amazon both made appeals to delay the enforcement of the rules but failed.