An internal investigation revealed that a single employee intentionally concealed these expenses over nearly three years.

Macy’s reported stronger-than-expected sales for the third quarter and said it’s delaying the release of its full quarterly results after it discovered an employee intentionally hid up to $154 million of expenses over several years.

Macy's on Monday delayed the publication of its third-quarter results due to an accounting issue tied to delivery expenses and instead posted preliminary results in which its sales missed Wall Street expectations.