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."
Federal prosecutors claim that when presented with evidence, "the defendants allegedly made repeated misstatements to US officials, including FBI agents and representatives from the US House Permanent Select Committee on Intelligence," according to a press release from the Justice Department.
Huawei's CFO, Meng Wanzhou, is also named as a defendant in the case. The superseding indictment also charges other individuals whom the Justice Department said have not yet been apprehended and whose names have not been publicly released.
On Thursday, Huawei accused the US government of seeking to "irrevocably damage Huawei's reputation" for competitive reasons, after the Justice Department announced the additional allegations.
"This new indictment is part of the Justice Department's attempt to irrevocably damage Huawei's reputation and its business for reasons related to competition rather than law enforcement," said Huawei. "The 'racketeering enterprise' that the government charged today is nothing more than a contrived repackaging of a handful of civil allegations that are almost 20 years old and that have never been the basis of any significant monetary judgment against Huawei. The government will not prevail on these charges which we will prove to be both unfounded and unfair."
Following the Justice Department's initial filing of criminal charges against the company and Meng last January, Huawei said it "is not aware of any wrongdoing by Ms. Meng, and believes the U.S. courts will ultimately reach the same conclusion."
In a prior statement, Huawei said it trusts "in Canada's judicial system, which will prove Ms. Meng's innocence."