The US treasury has imposed sanctions on three Mexican financial institutions accused of fentanyl-related money laundering, but Mexico has not received evidence.

The US Treasury has banned certain transactions with CIBanc, Intercam Banco and Vector Casa de Bolsa, accused of involvement in money laundering in the context of the fentanyl investigation. Although these measures target small institutions, experts warn that the impact on the Mexican financial system could be significant. Mexico's finance ministry has requested evidence from the US but has not received conclusive information. The sanctions do not block all activities of Mexican firms, but restrict transactions with the US.