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MIAMI (CBSMiami) – A boating accident early Sunday morning has led to the hospitalization of three children and one adult.

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According to Miami-Dade Fire Rescue, they responded to the channel at Blackpoint Marina at approximately 8:45 a.m. following a vapor explosion on a boat.

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The explosion took place about a quarter mile from the marina dock.

Seven people were on the boat, four of whom were injured and transported to local area hospitals. All three injured minors are under the age of 10.

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Authorities said there was no crash or collision that led to the explosion, and are now investigating what happened.