Story highlights An explosion from an e-cigarette killed man in St. Petersburg, Florida, authorities say

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(CNN) An explosion from an electronic cigarette has killed a man in St. Petersburg, Florida, according to authorities who are investigating the circumstances surrounding his death.

Tallmadge D'Elia, 38, was found dead this month after a fire alarm went off at his home and officers arrived on the scene, according to his autopsy report. Officials found him with a wound to his top lip area and areas of burns to his body. His death has been ruled accidental.

The cause of death is identified as a projectile wound to the head, Bill Pellan, director of investigations at the Pinellas County Medical Examiner's Office, said Tuesday.

The projectile was from a section of an e-cigarette. The autopsy noted that the e-cigarette was manufactured by Smok-E Mountain and was a "mod" type device.

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E-cigarettes are battery-operated devices that produce an aerosol by heating a liquid, usually containing nicotine, flavorings and other chemicals, according to the US Centers for Disease Control and Prevention . Users inhale the aerosol.