Aaron Hernandez was involved in a prison fight Monday at the Souza-Baranowski Correctional Center in Shirley, Massachusetts, CNN is reporting.
According to CNN, which cited a law enforcement source with knowledge of the incident, Hernandez agreed to be on the lookout for one inmate who went into another prisoner's cell. The two inmates fought, with the source telling CNN the altercation was believed to be gang-related.
All three inmates are being disciplined, according to the report. Hernandez was placed in a special management section at the correctional center.
A spokesman for the Massachusetts Department of Correction declined to comment to CNN.
Hernandez, the former New England Patriots star tight end, was convicted last month of the June 2013 murder of Odin Lloyd. He was sentenced to a mandatory term of life in prison without parole. His lawyers have appealed.
Hernandez is expected in court again Thursday, this time for a status hearing regarding his double-murder trial in Boston. He is accused of gunning down two men in 2012 after one caused him to spill his drink at a nightclub. Hernandez also is expected to be arraigned on charges of witness intimidation for allegedly shooting a witness to the fatal shootings, officials in Suffolk County Superior Court said.
Altercations behind bars aren't new for Hernandez.
In February 2014, Hernandez and an inmate being transported from the infirmary at the Bristol County House of Correction in Dartmouth, Massachusetts, allegedly exchanged words. Hernandez allegedly punched the inmate and knocked him to the ground. Neither was injured.
Hernandez was indicted in the alleged jail assault two months later.
Information from The Associated Press was used in this report.