New York (CNN Business) The US government has charged Chinese technology giant Huawei with racketeering and conspiracy to steal trade secrets, according to a superseding indictment unsealed Thursday in the US District Court for the Eastern District of New York.

A third charge alleges that Huawei engaged in wire fraud to steal intellectual property. The three new allegations supplement more than a dozen other charges already lodged against the company in a case originally unsealed last January. Huawei pleaded not guilty to the initial charges last March.

The Trump administration has been locked in a battle with Huawei for more than a year, as US officials have waged a campaign urging allies not to use Huawei's 5G equipment and enacted other measures aimed at stunting the company's growth.

The earlier charges alleged that Huawei committed bank fraud and violated economic sanctions against Iran, claims that the company has denied. Thursday's indictment also reveals new details about alleged Huawei business dealings in Iran and North Korea.

The Justice Department accuses Huawei of lying about its relationship with an affiliate business called Skycom, which allegedly helped Iran's government perform "domestic surveillance, including during the demonstrations in Tehran in 2009."

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