Public officials across Massachusetts offered their condolences Friday following the death of Massachusetts State Police Trooper Tamar Bucci, 34, killed in a Thursday night crash with a tanker truck.

After seeing a disabled car by the side of the highway in Stoneham, Bucci was pulling over to assist the driver around 11:45 p.m. when her patrol vehicle was hit by the truck, State Police Col. Christopher Mason said.

After she was struck, a pair of Good Samaritans passing by pulled Bucci from the car, and a Stoneham police officer arriving at the scene attempted to perform CPR, Mason said. Bucci was taken to Massachusetts General Hospital, where she was pronounced dead.

“Trooper Bucci is not just a coworker to us. She is our sister, and we are heartbroken by this devastating loss to our membership,” Patrick McNamara, vice president of the State Police Association of Massachusetts, said at a Friday morning news conference outside the state police Medford Barracks.

On Friday, Gov. Charlie Baker ordered flags on state buildings to fly at half-staff in Bucci’s honor.

Bucci is survived by her mother, father, two sisters, a stepbrother, and stepsisters.