A man is being treated for serious injuries after an acetylene tank he had in his vehicle exploded in Holden Saturday morning, according to Massachusetts fire officials.The State Fire Marshal’s Office said Holden firefighters and police officers responded to the area of 216 Brattle St. after receiving 911 calls about an incident involving a motor vehicle.When first responders arrived at the scene, they found a car that had sustained catastrophic damage and a man who had been pulled from underneath the vehicle by neighbors.The man was transported to an area hospital with serious injuries that are considered to be non-life-threatening, according to a spokesperson for the Massachusetts Department of Fire Services.The explosion did not cause any significant fire damage, according to authorities.Investigators said they have determined the man stored the acetylene tank in the trunk of his vehicle, where it appears to have leaked while the vehicle was parked overnight.The explosion is believed to be accidental, but the exact ignition source is being investigated by Holden firefighters, Holden police and Massachusetts State Police detectives assigned to the State Fire Marshal’s Office.Acetylene is a compressed gas that is commonly used in the welding and cutting of metals, according to the National Institute for Occupational Safety and Health.

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