Two boats were destroyed and a third was damaged in a fire at an Upper Florida Keys marina early Monday morning that investigators are calling “suspicious.” The Monroe County Sheriff’s Office confirmed Monday afternoon that one person was seriously injured in the blaze. It’s unclear if that person was the man a witness told deputies he saw running away in flames from one of the burning boats. Firefighters were called to the Coral Bay Marina on Upper Matecumbe Key in the Village of Islamorada around 1 a.m., said Chief Terry Abel with Islamorada Fire Rescue. Firefighters took about two hours to completely knock down the flames, he said.