ASHBY, Mass. (WHDH) -- The Ashby community is mourning the tragic loss of a mother and her teenage son after they were killed in a two-car collision in Fitchburg Sunday morning.

Michelle Martens, 36, was a volunteer EMT and firefighter in Ashby, and came from a family of firefighters.

For reasons unknown, the car Martens was in crossed into oncoming traffic and hit a truck that was being driven by another Ashby firefighter. Martens and her son, Justin Fournier, were ejected from their vehicle after crashing head-on into the pickup truck.

“A lot of the members are starting to filter in now to see what we can do,” said Chief William Seymour Jr., Ashby Fire Department.

Martens was a third-generation firefighter at the Ashby Fire Department. Martens father and grandfather were assistant chiefs.

Martens’ 16-year-old son wanted to follow in his family’s footsteps.

“He was going to be a member of the fire department, that was his dream,” Terry Hansen, victim’s mother. “He wanted to follow in his great grandfather’s, grandpa’s, and his mom’s footsteps.”

“He was in the process of joining the auxiliary department, so that would have been the fourth generation from that family on this department,” said Chief Seymour.

Fitchburg firefighters raced to the scene of the crash Sunday morning. The man in the pickup truck, who is also an Ashby firefighter, was rushed to the hospital.

“He has a crushed right heel, his right arm is injured. He does have a head injury also,” said Chief Seymour.

A family, an entire community, and fire department have been left heartbroken.

“Best sister I could ever want. We did everything together,” said Kathy Meade, victim’s sister.

“She was very nice to work with. We’re certainly going to miss her,” said Chief Seymour.

Martens has a 13-year-old daughter who will live with her grandparents.