The Coast Guard reported a diesel fuel discharge Tuesday afternoon from the Coast Guard Cutter Mackinaw while the ship was taking on fuel in the Detroit River in the vicinity of the Ambassador Bridge. The crew immediately secured the source of fuel and conducted initial clean-up operations onboard. Crewmembers also deployed boom around the fuel to prevent further spread. Coast Guard Sector Detroit pollution responders currently on scene estimate that 200-300 gallons entered the water.