Man, 37, dies welding pontoon in Dayton, Minn.

Dayton police confirmed a 37-year-old man was killed in an explosion while welding a pontoon on Wednesday morning.

The explosion happened at Crystal Welding on 113th Avenue North just off Interstate 94. It's unclear what caused the explosion. Witnesses described the incident as a boom, with the ground shaking.

Minnesota OSHA is investigating the incident and the Hennepin County Crime Lab was also on-scene Wednesday afternoon.

This is a developing story, please check back for more updates.

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