Authorities in Lakewood, Colorado say a report of a suspicious man on a city bus led to a deadly exchange of gunfire Thursday night that left the man and a police officer dead and three other officers and a civilian hurt.

What we know: Police said they responded at approximately 6:30 p.m. MT to a report of a suspicious person who was attempting to board a Denver Regional Transport District bus.

The man was believed to have been involved in a hit-and-run earlier in the day, Lakewood Police spokesman John Romero said.