(CNN) Chicago police have photos of people they'd like to talk to in the case involving "Empire" actor Jussie Smollett, who was the victim of what police are investigating as a possible hate crime.

Investigators have located a surveillance camera that shows people who are now wanted for questioning, Chicago police spokesman Anthony Guglielmi said in a statement on Twitter. Detectives had not yet found still images or video of the actual incident as of late Tuesday evening, police told CNN.

Camera footage doesn't capture the incident, but police want to question the two people in this image.

Smollett said he was attacked in the early morning hours on Tuesday in a Chicago neighborhood known as Streeterville by two people who were "yelling out racial and homophobic slurs" and "poured an unknown chemical substance" on him, according to police.

Smollett reported that one of his attackers also put a rope around his neck, police said. Police found video showing Smollett entering into his building with what appears to be a rope tied around his neck, police spokesman Anthony Guglielmi told CNN.

"It was being worn like a neck tie but shaped like a noose," Guglielmi said.

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