Baku, September 3, AZERTAC

Four people have been killed on a train in the Chicago area on Monday morning, according to Daily Mail.

Police responded to the scene after a 911 call on Monday morning about a shooting at the Forest Park CTA Blue Line station at 711 Desplaines Avenue in Forest Park, Illinois.

Three people were pronounced dead at the scene and a fourth died at the hospital.

Police said all the victims appeared to be homeless people riding the train.

A suspect fled the scene but was later taken into custody on a CTA Pink Line train in Chicago, as reported by ABC 7.

A gun was recovered during the arrest, police said.

Officials said the incident appears to be isolated and there is no further threat to the public.