Eleven U.S. senators have urged the government to investigate whether cryptocurrency exchange Binance violated U.S. sanctions on Iran and anti-money laundering (AML) rules, Cointelegraph reported on Feb. 28 local time.

In a letter to U.S. Treasury Secretary Scott Bessent and Attorney General Pamela Bondi, they stressed the need to closely review whether Binance is complying with sanctions and implementing a 2023 agreement. The senators claimed $1.7 billion in cryptocurrency flowed through Binance to terrorist groups such as the Houthi rebels and Iran’s Islamic Revolutionary Guard Corps (IRGC). They also said more than 1,500 accounts were opened by Iranian users and raised the possibility of evasion of sanctions on Russia.

The signatories included Chris Van Hollen, Ruben Gallego, Angela D. Alsobrooks, Andy Kim, Raphael Warnock, Tina Smith, Catherine Cortez Masto, Mark R. Warner, Elizabeth Warren, Jack Reed and Lisa Blunt Rochester. They said Binance could support sanctions evasion by launching payment cards in the former Soviet region and collaborating with a stablecoin project. The senators demanded the government report by March 13 on the results of its investigation into Binance’s actions.