The cause of the wildfires that swept through part of Long Island, New York, over the weekend is believed to have been a resident making s'mores, police said.

The wildfires began accidentally when someone in Suffolk County tried to light a fire to make s’mores, officials said. They were fully contained by Monday.

Investigators say embers from a backyard fire spread rapidly, fueling blazes that prompted evacuations and an emergency burn ban.

Law enforcement agencies are still interviewing all 911 callers to rule out any possibilities, but they "strongly feel that it was accidental."

A person trying to make the campfire snack s’mores in their backyard accidentally sparked the devastating wildfires on New York’s Long Island.