Smollet says he was attacked by two men screaming racial and homophobic slurs at him in the early morning hours of January 29.
CNN reports the two brothers purchased the rope that was tied to Smollett's neck at Ace Hardwood store in Chicago.
Speaking to United States breakfast show Good Morning America on Thursday, Smollett denied he had initially told police his attackers were wearing "Make America Great Again" hats and said he was frustrated doubt was being cast over his story.
Police at one point had placed them under arrest and referred to them as suspects in the case. They did not specify what the new evidence is.
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If you or someone you know is contemplating suicide, call the National Suicide Prevention Lifeline at 800-273-8255. Another person said: "Rest In Peace, Brody Stevens ". "Everybody loved Brody ", comedian Kristen Schaal tweeted.
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Seven of the injured were rushed by ambulance to a hospital in Brazil's Boa Vista, a spokesperson for the state governor's office said.
A spokeswoman for Smollett said she had no comment on the release of the two men Friday.
But in a statement to the Assosciated Press, Smollett's solicitor said there was no truth to the claims.
Chicago police are reassessing the attack on actor Jussie Smollett now that "new information" has come to light.
It also reveals that one of the alleged perpetrators is Smollett's personal trainer.
Attorneys for Jussie Smollett say there is no truth to reports that the "Empire" actor played a role in an assault on him last month by what he described as two men shouting homophobic and racial slurs.
Police continued to say on Friday that Smollett was still being treated as a victim in the case and not a suspect.
Smollett also appeared on TV news show Good Morning America on Thursday and told interviewer Robin Roberts he felt he was attacked because of his public stance against USA leader Donald Trump. "At the present time, Jussie and his attorneys have no inclination to respond to "unnamed" sources inside of the investigation, but will continue discussions through official channels".
Police have said they found no surveillance video of an attack but continue to look.