New Jersey State Police say that one person was killed and 14 others were injured when a van crashed on Route 24 East in Morris County Wednesday morning.

Authorities say that the van rolled down an embankment and landed deep in a wooded area off the highway in Hanover. Some passengers had to be extricated from the van, while others were ejected into the woods.

Of the injured, five are believed to be in critical condition, while nine others were triaged on the scene.

“The whole concept for triage is to prioritize quickly. Get the most critical patients out in ambulance quickly to the trauma system and work on scene with the staff to assess those patients and get them to the hospital,” says Morris County Office of Emergency Management Director Jeff Paul.

Paul says emergency responders on the scene were communicating with hospital staff at the ER through a new encrypted communications system so doctors and nurses knew what to expect when patients arrived.

Route 24 East was closed for a time following the crash, but all lanes have since reopened.

The cause of the crash is under investigation.