ST. PAUL, Minn. (WCCO) — Authorities say the garage fire that killed a man on the east side of St. Paul Thursday morning was likely caused by careless smoking.

Don Pnewski, 53, was trapped in the fire that spread rapidly through the free-standing garage he was using as a home.

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The fire broke out at about 2 a.m. on the 800 block of Juno Street. Shortly after they arrived the roof collapsed. St. Paul Fire Marshal Steve Zaccard said the blaze was not survivable.

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Pnewski died from smoke inhalation, according to the Ramsey County Medical Examiner.

Zaccard says it is a violation of St. Paul city code to live in your garage. Had inspectors known, Pnewski would have been ordered to leave.

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A half dozen friends said Pnewski had struggled for years with alcohol, that he had not worked a regular job  in years and spent much of his days drinking with friends. But all remembered him as a kind man who offered to do jobs.