Baltimore County police are investigating the theft of about 5,000 x-rays and radiological films, likely stolen for their silver coating, from St. Joseph Medical Center in Towson, Md., according to an Associated Press (AP) report. The films were from the years 2004, 2005 and part of 2007.

Officials from St. Joseph said they don’t believe patient information was the target, though accompanying records did contain some medical information, according to the AP. No contact information, Social Security numbers or financial information was compromised.

No suspect has been identified by Baltimore County police.

The Baltimore Sun reported that the hospital uses an outside company to destroy outdated x-ray films and the stolen films were scheduled for destruction as part of St. Joseph’s record management program.

Officials believe the theft occurred on Sept. 11 when someone posed as a worker for the film disposal company to gain access to the film, according to the Baltimore Sun. The theft was discovered five days later.

The theft comes on the heels of another incident involving the loss of a portable hard drive containing medical records for patients at St. Joseph. An employee of Baxter, Sidle, Conn & Jones law firm lost the drive in August while the firm was working on a malpractice case involving a suit against cardiologist Mark G. Midei, MD, according to the Baltimore Sun.