Two people are dead and two others hospitalized after an SUV overturned on the northbound Baltimore-Washington Parkway in Prince George’s County, Maryland.

Law enforcement responded to the crash around 1 a.m. Monday, and found the vehicle overturned off the highway’s northbound lanes near Beaver Dam Road, in Greenbelt.

Of the SUV’s four passengers, two were pronounced dead on the scene while two others were transported to a hospital for treatment.

One woman was reported to be in critical condition. A second woman was said to have been seriously injured, but is expected to recover.

U.S. Park Police and Maryland State Police medevac helicopters were called to the scene but did not transport anyone.

An investigation continues to determine what led to the crash.

The WTOP Traffic Center reports the northbound parkway reopened around 6 a.m. following an earlier closure between Md. Route 193/Greenbelt Road and Powder Mill Road. Drivers should plan for residual delays.

Below is a map of the area:

[google_map latitude=”38.995662″ longitude=”-76.877585″ zoom=”14″ height=”300px” location_label=”” dynamic_map=”false”]

WTOP’s Alejandro Alvarez contributed to this report.