Former NFL linebacker Adrian Robinson Jr has committed suicide at the age of 25.

On Sunday, it was confirmed on Facebook by the American Football player's agency Symmetry that Robinson Jr had passed away, but it has only just come to light that he took his own life.

Robinson Jr, who played college football at Temple University, went on to represent the Pittsburgh Steelers, Denver Broncos, San Diego Chargers and the Washington Redskins in his career.

According to TMZ, Jeff Moran of the Philadelphia Medical Examiner's Office has revealed this week that the "cause of death was suicide by hanging".

The original statement from Symmetry read: "It deeply saddens all of us to share with you that Adrian Robinson Jr passed away last night at the age of 25.

"Adrian was a beloved father, son, brother, friend and teammate. We ask that you please respect his family's privacy during this difficult time, and especially keep his daughter Avery Marie in your prayers. Thank you for all of your support and consideration."

False reports initially emerged claiming that Robinson Jr had been involved in a shooting.