The Museum of Science and Industry was closed Wednesday as staff moves military artifacts from archival storage.

The closure was initially described as “unplanned maintenance.”

“Out of an abundance of caution, and to ensure proper and safe removal, we have specially trained military personnel as well as local officials on-site,” a statement from museum spokesperson Kelsey Ryan reads.

The relocation of the artifacts happened on short notice because of scheduling conflicts and availability of the officials involved.

Ryan didn’t answer further questions about the type and number of artifacts and where they were being moved.

The museum is expected to be open Thursday for regular hours, according to a news release.

Anyone who purchased tickets in advance for Wednesday will be refunded or can rebook their tickets by calling 773-684-1414.