MINNEAPOLIS (WCCO) — Investigators say that a house explosion killed a man in Lyon County early Thursday morning, and left another woman injured.

The explosion happened along Minnesota State Highway 19 east of Marshall, Minnesota at about 6:30 a.m.

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A man was pronounced dead at the scene, and a woman was taken to the Marshall Avera emergency room for injuries she sustained in the explosion. Neither have been identified by authorities.

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It’s not clear yet what caused the incident.

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Crews requested that onlookers stay clear of the scene while investigators work to determine what happened.