DULUTH, Minn. (AP) — Duluth police say a city bus driver suffered a medical emergency before crashing into another bus, killing a passenger.

The crash happened just after 5 a.m. Tuesday in downtown Duluth. According to police, an eastbound bus struck a stoplight and then collided with another bus coming in the opposite direction.

Police say the 58-year-old driver of the eastbound bus apparently suffered a medical emergency. A passenger in the eastbound bus died. The victim is identified as 53-year-old Michael Joseph Mooney of Duluth.

Seventeen people were aboard the two buses, including the drivers. Nine people were treated at hospitals.

The crash remains under investigation.

More From KROC-AM