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Aaron Hernandez Update: NFL's Mike Pouncey reportedly subpoenaed in connection with Hernandez grand jury probe

Mike Pouncey of the Miami Dolphins watches his team from the bench against the Tampa Bay Buccaneers during the NFL Preseason Game at Sun Life Stadium on August 10, 2012 in Miami Gardens, Florida. J. Meric/Getty Images

(CBS) - Miami Dolphins center Mike Pouncey was served with a grand jury subpoena after the team lost to the New England Patriots at Gillette Stadium in Foxboro, Mass. on Sunday afternoon, Sports Illustrated reports.

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A source with knowledge of the matter reportedly told the magazine that the subpoena is related to the investigation into Aaron Hernandez, the former Patriots star who is charged with murder in the shooting death of Odin Lloyd.

The source reportedly said police are looking into Hernandez's potential involvement in interstate gun trafficking.

According to the magazine, the 24-year-old Pouncey is a close friend of Hernandez and played football with him at the University of Florida.

READ: Timeline of Aaron Hernandez murder investigation

Neither Pouncey nor the Miami Dolphins have commented on the situation. Pouncey reportedly traveled back to Miami with the Dolphins on Sunday night.

The month after Hernandez's June 26 arrest, Mike Pouncey and his twin brother, Pittsburgh Steelers center Maurkice Pouncey, were photographed in a nightclub wearing "Free Hernandez" hats. The photograph surfaced on social media and Maurkice Pouncey later apologized, saying, "I regret that my actions appear to make light of that serious situation," reports the magazine.

Sports Illustrated reports that a Steelers spokesman declined all comment, including when asked if Maurkice Pouncey had been served.

Hernandez, 23, was indicted in Augustin the June 17 killing of the 27-year-old Lloyd, a semi-professional football player who was dating the sister of Hernandez's girlfriend. He pleaded not guilty to first-degree murder and five weapons-related charges last month and is being held without bail at a county jail.

Complete coverage of Aaron Hernandez on Crimesider

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