A child's medical device left near the AMC movie theater in White Marsh Saturday triggered a brief evacuation of the cinema, Baltimore County police said.

Police spokesman Lt. Robert McCullough said police received a call around 3:30 p.m. for a report of a suspicious package. About 30 minutes later the child's parents returned and retrieved the device, which McCullough described as a nebulizer.

Such devices convert liquid medicine into mist that patients can inhale.

Social media users first reported being evacuated from the theater and posted pictures of police responding to the scene.