An incident in which something was ignited during a movie at an Anne Arundel County mall Saturday night remained under investigation Monday, but police said they were looking for a “person of interest.”

County police said Saturday night that they had initially received a report of shots fired at the mall. A witness said she saw people rushing from the theater at Arundel Mills mall.

People hurried in all directions after the 10:11 p.m. report as rumors spread about what had happened, the witness said.

Police quickly determined that no shots had been fired. Instead, they said, someone had set off what they described as “possible fireworks” inside a juice bottle.

No one was injured in connection with the detonation, police said, but someone was taken to a hospital with non-life-threatening injuries that did not result directly from the incident, police said.

At the time, the theater was showing “300: Rise of an Empire,” for which about 325 tickets had been sold, the police said. The theater, which has a number of screens at the mall, was not full at the time.

Police did not name the man they wanted to talk to and did not say what caused them to describe him as a person of interest.