Updated

The Latest on a murder-suicide on the Chicago Skyway (all times local):

9:30 p.m.

Authorities say a 30-year-old man fatally shot a 49-year-old woman on a major Chicago expressway before shooting and killing himself.

The Chicago Tribune reports Lisa Fisher of Broadview and Christopher M. Pena of Chicago were arguing as they traveled on the Chicago Skyway around 4:15 a.m. Wednesday.

They had just passed slowly through a tollgate when Fisher jumped out of the car.

Police say Pena, who was driving, got out and shot her several times. He then got back into the car and shot himself in the head.

The shooting forced authorities to close part of the route between Indiana and Chicago for about five hours.

It was unclear late Wednesday if Fisher and Pena had been in a relationship.

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10:01

Authorities say a man gunned down a woman believed to be his wife during an argument on a major Chicago expressway before he shot and killed himself.

The shooting at about 4:15 a.m. Wednesday forced authorities to close the Chicago Skyway for about five hours. The expressway connects Chicago and Indiana.

Chicago Police spokesman Anthony Guglielmi says the woman climbed out of the vehicle driven by the man and was walking away when he got out and shot her several times. He then got back in the vehicle and shot himself.

Guglielmi says investigators believe the two were married but are trying to verify their identities. He says witnesses told investigators that the two were shouting at each other shortly before the woman was shot.