Kenyan police have seized $20 million of counterfeit banknotes that had been stored in a personal safety deposit box at a branch of Barclays Bank Kenya.

Police had also confirmed the arrest of six people, including two of the bank’s staff on Tuesday. This information was disclosed in a statement posted on its Twitter account.

Barclays Kenya, part of South Africa’s Absa Group, confirmed on Tuesday that police had seized fake currency from a customer’s deposit box, and said it was not the bank’s money and that it was cooperating with the investigation.

The seizure comes at a time when lawmakers are pushing for implementation of amendments to banking laws that would relax the rigorous requirements for recording transactions above $10,000.