April 13 (UPI) -- One man was killed and three people injured in a "targeted, isolated" shooting Thursday on one of the largest rapid transit systems in the U.S.
Zachariah Hunnicutt, 38, was the victim of the attack on a MARTA train in Atlanta, Transit Police Chief Wanda Dunham said. It's not known what led to the shooting.
MARTA, the Metropolitan Atlanta Rapid Transit Authority, is the nation's eight-largest by ridership, according to the American Public Transportation Association.
In response to the shooting, MARTA police will have an increased presence on the train.
The suspect, who tripped and fell trying to escape, was taken into custody, but his name has not been released.
Two men and a woman who were also shot are in stable condition, authorities said.
MARTA CEO Keith Parker commended first responders and expressed his condolences.
"My thoughts and prayers remain with the victim and everyone impacted in today's incident," he said.