(Photo by JEFFREY HASTINGS) A Londonderry police officer views one of the two vehicles involved in Saturday's head-on collision during the investigation that followed the 3:30 p.m. crash.

LONDONDERRY — A head-on, two-vehicle crash on Litchfield Road Saturday afternoon left both drivers — one of whom was ejected and the other entrapped — with serious, life-threatening injuries, officials said.

The crash occurred around 3:30 p.m. on a curve roughly halfway between High Range and Mammoth roads, in the northern part of town. Litchfield Road was closed for some time between Alexander and Kelley roads to allow police to conduct an on-scene investigation and have the wreckage of the vehicles removed.

Fire Department Battalion Chief Bruce Hallowell said both drivers suffered multi-system trauma, meaning that they sustained significant injury to two or more critical body systems.

Neither driver has yet been identified. While officials said some callers initially indicated there were additional people injured in the crash, only the two drivers were involved.

Due to the nature of the drivers’ injuries, Hallowell said two ambulances were called to the scene as well as two medical helicopters, one from Boston MedFlight and one from Dartmouth’s DHART.

(Photo by JEFFREY HASTINGS) Londonderry medical personnel tend to the driver of one of the two vehicles involved in Saturday's head-on crash on Litchfield Road, as firefighters work to extricate him or her from the wreckage.

As crews worked to free the entrapped driver and administer emergency treatment to both of them, a landing zone was set up for the helicopters on the athletic fields at Londonderry Middle School.

The two patients were then transported by ambulance to the landing zone. The first to arrive was Boston MedFlight, the crew of which worked on the patient inside the ambulance, then transferred him or her via helicopter to a Massachusetts hospital.

Once the BedFlight took off, DHART landed and worked with Londonderry firefighters in the ambulance. A decision was made that based on the medical condition of the second victim they would not be flown according to Hallowell. Instead, he or she was rushed by ambulance to a local hospital.

–JEFFREY HASTINGS

(Photo by JEFFREY HASTINGS) A Londonderry police officer works at the scene of the two-car crash on Litchfield Road in Londonderry Saturday that left the drivers in critical condition