A man was fatally shot at a Metro Blue Line station Friday morning in Compton during a fight, authorities said.
He shot the other man and ran away, according to Deputy Guillermina Saldaña of the Los Angeles County Sheriff's Department.
Despite being wounded the injured man was able to chase the person who shot him, who turned around and fired several more shots at him.
An armed Metro security guard saw the shooting and fired a round at the gunman as he ran away.
Authorities don't know if the gunman was hurt during the shooting.
He was taken to Harbor-UCLA Medical Center and pronounced dead at 9:20 a.m., he said.
Transit deputies had responded to all Blue Line stations after receiving a report of a man with a gun, Montenegro said.
They did not find the gunman, but they found the shooting victim. His identity has not been released.
Authorities say the gunman was last seen running north along the railroad tracks.