A 73-year-old woman suffered a fatal heart attack before crashing into a MetroLINK bus and two other vehicles Monday morning in Moline, Rock Island County Coroner Brian Gustafson said.

Gustafson identified the woman as Sharon F. Hensley of Milan.

A small dog that was with her in the car died at the scene, Gustafson said.

The crash occurred about 8:15 a.m. at the intersection of 60th Street and John Deere Expressway. The MetroLINK bus, two cars and a van were involved, Moline Police Detective Scott Williams said.

A Moline Fire Department ambulance took Hensley to Genesis Medical Center-Silvis, where she was pronounced dead.

She was eastbound on John Deere Expressway and struck the side of the northbound bus on 60th Street.

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The bus continued northbound through the intersection, veering into the westbound lane of John Deere Expressway. A car and a van stopped on the expressway for a red light in the westbound lanes were struck by the bus. The two vehicles received extensive front-end damage, but the drivers were not injured.

The driver of the Metro bus was transported by MetroLINK supervisors to a UnityPoint hospital. Don Krueger, safety security officer for MetroLINK, said the driver was checked out and is doing fine.

Two passengers were on the bus when the accident occurred, and they were not injured, Krueger said.

It is the first 2014 traffic fatality for Moline police, Williams said. The crash remains under investigation by Moline traffic investigators.