NEW YORK (Reuters) - A U.S. judge on Monday rejected Rio Tinto Plc’s bid to dismiss a Securities and Exchange Commission lawsuit accusing the Anglo-Australian mining company of civil fraud in its handling of a failed investment in a Mozambique coal project.

FILE PHOTO: A sign adorns the building where mining company Rio Tinto has their office in Perth, Western Australia, November 19, 2015. REUTERS/David Gray/File Photo

U.S. District Judge Analisa Torres in Manhattan said the regulator may pursue some claims in its October 2017 lawsuit against Rio Tinto, former Chief Executive Officer Tom Albanese and former Chief Financial Officer Guy Elliott.

Torres narrowed the main fraud claim against Rio Tinto and Albanese to focus on the former CEO’s statements about Mozambique growth prospects, finding no proof they intended to overvalue Rio Tinto Coal Mozambique (“RTCM”) by more than $3 billion.

Albanese and Elliott still face SEC claims that their actions led to the overvaluation appearing in a semi-annual Rio Tinto financial report.

Rio Tinto’s market value is more than $93 billion, making the company one of the biggest in the SEC’s crosshairs.

Rio Tinto and lawyers for the defendants did not immediately respond to requests for comment. An SEC spokesman declined to comment.

The SEC accused the defendants of deceiving investors over Mozambique coal assets that Rio Tinto bought in 2011 for $3.7 billion, through a takeover of the former Riversdale Mining.

By overvaluing the assets, despite an internal assessment that they were worth negative $680 million, Rio Tinto was able to raise more than $5.5 billion from unsuspecting U.S. investors, according to the SEC.

Evidence included an internal May 2012 email from an RTCM executive that flagged poor communication between ministries, and the alleged “influence of corruption on decision-making.”

Rio Tinto took a more than $3 billion writedown for Mozambique in January 2013. It sold the assets in late 2014 for $50 million.

The surviving SEC case includes a claim that Albanese intended to mislead investors in 2012 by describing the Moatize Basin, where RTCM was located, as a world-class basin coal deposit and long-term growth opportunity.

“Through these statements, Albanese was misrepresenting material facts to investors,” Torres wrote in her 50-page decision.

In court papers, the defendants said the SEC had failed to establish fraud, and was “plainly wrong” to conclude a big writedown was needed sooner, given the complexities of the accounting procedures and valuation assessments.

The Australian Securities and Investments Commission brought its own civil claims against Rio Tinto, Albanese and Elliott.

The case is SEC v Rio Tinto Plc et al, U.S. District Court, Southern District of New York, No. 17-07994.