The actor told police the men struck him in the face with their hands and poured an unknown chemical on him before wrapping a rope around his neck.
"They still have a lot more cameras to look at, " Guglielmi said.
The investigation into the attack, which reportedly occurred around 2am on Tuesday morning, is ongoing with the police obtaining nearby surveillance footage in a bid to identify the attackers. "You are better than that, we are better than that, America is better than that".
"Photos of people of interest who were in area of the alleged assault & battery of Empire cast member", Anthony Guglielmi, the police's chief communications officer, tweeted on January 30, referring to the photos.
"Overnight, the Chicago Police Department received a report of a possible racially-charged assault and battery involving a cast member of the television show Empire", the statement read.
After the attack, Smollett returned to his apartment, and his manager called police from there about 40 minutes later, Guglielmi said. Smollett was taken to Northwestern Memorial Hospital where he was treated. When officers arrived, Smollett still had the rope around his neck, and was still wearing the shirt splattered with the unidentified substance.
As Smollett reported to the Chicago police this week, he found himself the target of the same ignorant homophobia that his character bravely confronts on the show, along with racism - you know, the same type of bigotry that far-right folks say doesn't really exist - when he was attacked in public.
Guglielmi also said the FBI is investigating a threatening letter targeting Smollett that was sent to the Fox studio in Chicago last week.
In addition to his acting career, Smollett has a music career and is a noted activist, particularly on LBGTQ issues.
The shut down is not related to the suspected racial, homophobic attack on Smollett, but the attack has sent chills throughout the entertainment and social justice communities. Prayers go out to Jussie Smollett.
White House hopeful and California Sen. "It's outrageous", she said.
Smollett also told police during a follow up interview that they said to him: "This is MAGA country, " during the alleged attack.
Chicago has one of the most sophisticated and extensive video surveillance systems in the US, with thousands of cameras on street poles, skyscrapers, buses and in train tunnels.
Since the first reports of the attack emerged, there has been an outpouring of support from celebrities online, among them John Legend, Ariana Grande, Ellen, Kamala Harris, Viola Davis, Janelle Monáe, Steve Harvey and many others.