DENVER (KDVR) — A driver hit a Denver officer’s patrol vehicle at a crash investigation while the officer was sitting in it overnight Monday.

The incident happened at eastbound Interstate 70 and Brighton Boulevard around 1:30 a.m.

The DPD officer was investigating a crash when the driver of an SUV rear-ended the officer’s fully marked patrol car.

Both the officer and driver were taken to the hospital. The SUV driver suffered serious injuries but is expected to survive. The officer was later released.

A stretch of I-70 was closed for some time but has since reopened.

The crash is under investigation, but Denver police do not believe impairment is a factor.