SecurityWeek is reporting that tens of gigabytes of files apparently belonging to the United States Army Intelligence and Security Command (INSCOM), including classified information, were stored in an unprotected server.

According to Upguard, who found the files, they discovered the data on an AWS subdomain named “inscom” in late September.

The AWS storage container found by UpGuard included, among others, a virtual machine image that may have been used to send, receive and handle classified data.

INSCOM has not responded to SecurityWeek’s request for comment.

This is not the first time UpGuard claims to have found data belonging to the Pentagon and other U.S. government organizations.