A Dattco charter bus that caught fire on I-95 in Darien during Sunday’s major snowstorm was traveling from New York City to Fall River, Massachusetts, according to Darien First Selectman Jon Zagrodzky.

“It's unclear why they were out on the road when the governor issued a commercial traffic ban, but they were out there,” Zagrodzky said.

The ban was for all state highways and was in effect from noon on Sunday through 6:30 a.m. Monday. The fire happened just after 1 p.m. Sunday on the northbound side of the interstate between exits 10 and 11. Fifty-five passengers and the driver were on board, per Zagrodsky.

News 12 reached out to Dattco for comment but did not hear back yet.

Despite the snow and frigid temperatures, dozens of first responders arrived on scene to evacuate people and put out the flames. The town’s three fire departments—Darien, Noroton and Noroton Heights—suited up. All are volunteer, as is Darien EMS-Post 53, which also responded.

“Darien is actually the only town in lower Fairfield County that has an all-volunteer fire and EMS service. It's quite amazing actually,” stated Zagrodsky.

In addition, Post-53 is the only EMS organization in the country run by high school students.

“When we originally got dispatched, the only information they gave us was it was multiple patients,” recalled junior Jackson Philip. “Fifty-five patients was definitely a little scary, but it's something that we train for every day.”

Philip said the biggest issue was single digit temperatures. Several passengers were older and struggled with the cold so getting everyone someplace warm was critical, he explained. “We originally got all patients down to Darien Public Works right there, and after that, we immediately began triaging,” Philip said.

News 12 was told no one was seriously injured. Six people went to the hospital, per Zagrodsky, who did not have information about their conditions.

Darien’s first responders were joined by Stamford EMS, Norwalk EMS and Connecticut State Police. Zagrodsky credited the teamwork of all first responders for preventing what could have been a major tragedy.

“They're taking their lives into their own hands, and they really deserve our gratitude and our thanks and frankly our admiration for what they do,” Zagrodsky stated.

“Everyone worked so hard together. Our communication was on point, and it's just really the training at the end of the day that allowed us to succeed on this call,” Philip said.

Zagrodsky told News 12 an investigation will determine the cause of the bus fire, but it’s believed to be mechanical failure.