Twenty-nine-year-old Angel Luis Rios Jr. was found with two gunshot wounds to the torso around 9 p.m. near the intersection of South Independence Mall East and Chestnut Street, the department told Daily Voice.
He was rushed to Jefferson Hospital where he succumbed to his wounds just before 9:30 p.m., police said.
A short while later, officers were called to Pennsylvania Hospital where a 36-year-old man had walked in with a gunshot wound to his arm, investigators continued.
Detectives believe Rios was in a group of motorcyclists that became involved in a road rage argument with the 36-year-old before exchanging gunfire.
A 24-year-old man was detained at the scene after National Park Service Rangers said they saw him shooting at a vehicle that fled, though police say no arrests have been made as of Monday, Aug. 27.
The killing remains under investigation.
Click here to follow Daily Voice Drexel Hill-Upper Darby and receive free news updates.