An MUFG Bank (NYSE:MUFG) employee is under suspicion for allegedly leaking tender offer details and other non-public information about client companies to family members, Japanese media reported.

This comes only weeks after the banking group faced reprimand for breaching internal firewalls.

Reports indicate that relatives of the employee may have used the leaked information to trade stocks, potentially earning several million yen.

An MUFG Bank spokesperson confirmed that Japan’s Securities and Exchange Surveillance Commission is investigating the matter.

The spokesperson stated that the bank, a unit of Mitsubishi UFJ Financial Group, will fully cooperate with the ongoing investigation but declined to comment further.