Wind-driven brush fires that burned on New York’s Long Island over the weekend, injuring two firefighters and sending large smoke plumes into the air, appear to have been started by people making s’mores in their backyard,

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.

The wildfires that burned through more than 600 acres on Long Island probably originated from a backyard fire in Manorville, Suffolk County, police said.