West Midlands Police has launched an appeal after a robbery took place in the car park of Moseley Hall Hospital last week.
Three people were approached and threatened by four men with weapons who demanded the keys to a black VW Golf on Monday 8 July at around 8pm.
A woman handed over her keys and the men left the scene in the car.
Nobody was injured but the victims were left shaken by the incident.
Anyone with information can contact police quoting crime reference 20BE/161908Y/19 via Live Chat on the West Midlands Police website, call 101 anytime or contact Crimestoppers anonymously on 0800 555 111.