The Trump administration froze $344 million in crypto assets allegedly linked to Iran, escalating financial pressure on Tehran as diplomatic efforts around the war remain fragile, CNN reported Friday.

The report builds on Tether’s disclosure Thursday that it supported the US government in freezing $344 million in USDT across two addresses after several US authorities shared information about activity tied to unlawful conduct. Tether said the freeze was carried out in coordination with OFAC and US law enforcement, preventing further movement of the funds.

A US official told CNN that the government had information connecting the crypto to Iran, including transactions with Iranian exchanges and intermediary wallets…