Delaware State Police are investigating a serious crash in which four people were injured.

Delaware State Police are investigating a serious crash in which four people were injured.

The crash occurred Monday, Dec. 14 at 3:40 p.m.

According to police, Stephanie Montgomery, 31, of New Castle, was operating a 2014 Ford Escape and was traveling in the right hand lane of northbound DuPont Parkway (U.S. Route 13) just south of Pole Bridge Road, north of Middletown.

Police said that Montgomery failed to observe traffic stopped in front of her and struck the rear of a 2015 Ford F-350 which was stopped in traffic on DuPont Parkway, and which was being operated by Carl Vance, 58, of North East, Maryland. The force of the impact propelled the Ford in a northbound direction where it then struck the rear of a 2002 Ford EC1, which was also stopped in the right hand lane of northbound U.S. Route 13, and which was being operated by Aaron Reeves, 33, of Claymont.

The force of the initial impact also caused several rocks which were in the bed of the Ford F-350, to be launched into the air where they then struck a 2010 Acura TSX which was stopped in the center lane of US Rt. 13, and which was being operated by Alexis Spencer, 17, of Middletown.

Montgomery was treated at the scene by New Castle County Paramedics. She was then flown by Delaware State Police Aviation (Trooper 4) to the Christiana Hospital Trauma Center where she was treated for her serious injuries.

Vance, as well as a 49-year-old male passenger and a 36-year-old male passenger in his vehicle, were also treated at the scene by New Castle County Paramedics. They were then removed from the scene by EMS and transported to the Christiana Hospital with non-life threatening injuries. There were no other injuries.

The right and center lanes of northbound US Route 13 were closed for a period of time as the crash was investigated and cleared.

This crash remains under investigation by the Delaware State Police.