Medical helicopter lands on I-25 frontage road after crash south of Castle Rock

CASTLE ROCK, Colo. — A medical helicopter landed on the Interstate 25 frontage road south of Castle Rock after a major crash Thursday afternoon.

The Colorado State Patrol initially said it might need to shut down the interstate to land the chopper, but the landing only caused a brief lane closure on the southbound side.

Officials later said four people were taken to a hospital in ambulances. There was no information about the extent of their injuries, but the CSP said there were no fatalities.

The two vehicles involved in the crash are a 2006 Acura SUV and 2006 Subaru, officials said.

It’s not clear what led to the crash, which is under investigation.