Tyson Fury says his cousin was killed after being stabbed in the neck in the UK over the weekend ... and now, he's pleading with government officials to crack down on knife crime in wake of the tragedy.
According to authorities, Fury's relative, 31-year-old Rico Burton, was killed following an incident at a popular bar at around 3 a.m. on Sunday in Manchester. A 17-year-old was also injured in the altercation, cops said, and remains hospitalized.
Fury took to his Instagram page after learning of Burton's death to mourn the loss -- and called for greater punishment for knife crimes to hopefully deter similar incidents from happening going forward.