A security dog at University of Arizona Medical Center is missing, according to Tucson police.

Shadow, a black-and-tan longhaired German Shepherd, went missing from the area of East Grant Road and North Mountain Avenue on Saturday.

Shadow's handler said he is a friendly and social dog towards people, but not as comfortable around other dogs.

Anyone with information about the missing dog, can call UAMC at 694-6533 or 909-3393.