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Two freight cars hauling carbon dioxide derail in Tewksbury

A hazmat team responded to Tewksbury on Friday after freight cars carrying carbon dioxide derailed, officials said. Crews worked at the scene in the 1600 block of Shawsheen Street through the afternoon and ultimately determined that the surrounding area did not need to be evacuated, Tewksbury Fire Captain James Bruce said.

“No evacuations, no injuries, no problems at all. Everything’s back to normal,” Bruce said Friday evening.

The freight cars were back on the tracks and running by 5 p.m., he added.

Earlier Friday, Bruce noted that the cars were intact and there were no signs of leakage.

“There’s no fire. Nothing’s leaking. No explosion,’’ Bruce said. The cars “are just sitting on the tracks.’’

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Keolis spokesman Mac Daniel expected no impact on MBTA commuter rail service because those trains do not use the tracks where the derailment occurred. In some parts of Greater Boston, commuter rail service shares tracks with freight trains.

According to State Fire Marshal Peter J. Ostroskey’s office, some of the cars that derailed were refrigerated cars hauling carbon dioxide. Officials released some of the gas through pressure release valves, a standard safety measure.

Area businesses were notified but no evacuations were ordered, according to Jennifer Meith, a spokeswoman for the fire marshal.

Pan Am Railways, the operator of the freight train service, did not immediately respond to a request for more information about the incident.

Bruce said four cars came off the tracks, but train crews were able to remove two of them because they were empty. The two remaining cars held the carbon dioxide, he said.


John R. Ellement can be reached at ellement@globe .com. Follow him on Twitter @JREbosglobe. Reenat Sinay can be reached at reenat.sinay@globe.com.