FOREST PARK, Ill. >> A shooting on a subway train outside Chicago on Labor Day morning left four people dead, police said.

Three people were pronounced dead at the Forest Park station, an above-ground stop on the Chicago Transit Authority’s Blue Line. The fourth victim died at a hospital.

The suspect got away but was subsequently arrested on a train on a different route, Forest Park police said.

“A weapon was recovered,” Forest Park Deputy Chief Chris Chin told reporters.

Police were called about 5:30 a.m. Chin said he had no immediate information to disclose about the victims. He called the shooting “shocking” and “horrible.”

“This heinous and egregious act of violence should never have occurred, nonetheless on a public transit train,” the Chicago Transit Authority said.

The CTA said security camera video “proved to be vital” in helping investigators.

– The Associated Press