SEATTLE, Wash. —The United States Postal Inspector’s Office s investigating a series of post office box break-ins at the Lake City Post Office Branch.

Jack Kleinart said he found out that his post office box was tampered with when he checked his mail last week.

“That’s why we have a post office box in the first place is for the security,” said Kleinart.

A spokesperson for the Postal Inspector’s Office said that the post office box owners who were impacted got letters dropped in their mailboxes. However, Kleinart said he never received one.

The spokesperson added that he wasn’t sure if other post office box holders were notified of the ongoing problem of post office box break-ins at that location.

Post office box holders say they were never notified by USPS about break-ins