(Repeats story to more subscribers.) Oct 7 (Reuters) - The United States is considering restrictions on China’s Ant Group as well as Tencent Holdings Ltd over concerns their digital payment platforms threaten national security, Bloomberg News reported on Wednesday. Such a move would mark a new deterioration in relations between the world’s two largest economies, which have been stained by disputes over trade, Hong Kong’s autonomy, cyber security and the spread of the novel coronavirus. The step would also illustrate how President Donald Trump’s administration is now seeking to prevent Chinese firms from engraining themselves in the U.S. financial system before they become a significant threat. In the last year, the United States has cracked down on Huawei and TikTok after allowing the Chinese-owned firms to become major players in U.S. telecommunications infrastructure and social media, respectively. U.S. officials have expressed concerns that these firms could be passing on the information of U.S. citizens to China’s Communist Party government. ADVERTISEMENT Both Ant’s Alipay and Tencent’s WeChat payment platforms are used primarily by Chinese citizens holding accounts in renminbi. Most of their interactions with the United States are with U.S. merchants accepting payments from Chinese travelers and businesses. Talks over how and whether to restrict Ant Group and Tencent’s payment systems have picked up pace among senior U.S. officials in recent weeks, though a final decision is not imminent, Bloomberg reported, citing people familiar with the matter. A spokesperson for Ant Group said the company was “unaware of any such discussions within the administration”. “Ant Group’s business is primarily in China and we are excited about our growth prospects in the China market. Our mission is to contribute to economic growth and job creation through serving ordinary consumers and small businesses,” the company said. Tencent and the White House did not immediately respond to requests for comment. ADVERTISEMENT The U.S. government has been taking separate action against Tencent’s WeChat app. Last week, the U.S. Justice Department said it would appeal a judge’s decision to block the government from barring Apple Inc and Alphabet Inc’s Google from offering WeChat for download in U.S. app stores. Ant Group, backed by Chinese e-commerce giant Alibaba , plans to list simultaneously in Hong Kong and on Shanghai’s STAR Market this month in what could be the world’s largest initial public offering, surpassing oil giant Saudi Aramco’s $29.4 billion float in December. The financial technology firm is seeking to raise about $35 billion after assessing early investor interest and based on a higher valuation of about $250 billion or more, Reuters has reported. Shares of Alibaba, which owns a third of Ant, held up on the news and ended trading up 1.4% at $296.50 in New York on Wednesday, indicating that investors did not see any immediate financial fallout for the company. Ant derives 95% of its revenue from China. (Reporting by Noor Zainab Hussain and C Nivedita in Bengaluru; Editing by Maju Samuel and Cynthia Osterman)