This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

ARAPAHOE COUNTY, Colo. (KDVR) — The Arapahoe County Sheriff’s Office is investigating a major crash involving an RTD bus and multiple vehicles on Thursday morning.

The crash happened before 6:30 a.m. near Parker Road and Orchard Road.

The sheriff’s office said four people were taken to the hospital with serious injuries, including the driver of the RTD bus and a passenger.

The Colorado Department of Transportation said the northbound lanes of Parker Road reopened around 8:15 a.m. near Cherry Creek State Park.

This is a developing story. Please check back for updates.