One solider from an Army Reserve unit in New York is in critical condition Friday and three others are recovering in the hospital after their Humvee overturned on the New Jersey Turnpike.

State police said the Humvee overturned in South Brunswick on Thursday. 

Sgt. Theodore Jackson, 40, remains in critical condition.

Spc. Marcos Santana, 24, and Pfc. Deborah Perez, 25, are in serious condition. Perez sustained serious leg injuries. The driver, 24-year-old Sgt. Gedry Concepcion-Munez, is listed in good condition.

Photos from the scene show the mangled truck upside-down against a guardrail. Soldiers used a jack to lift the Humvee off the trapped passengers. One of its tires had fallen off.

The soldiers are from the 533rd Brigade Support Battalion stationed at Fort Totten in Queens, New York.

The crash occurred around 3 p.m., according to a state Department of Transportation traffic-monitoring website. Police didn’t immediately say why the truck overturned.

The Associated Press contributed to this report.