JONESPORT — The Coast Guard says it’s responding to a large oil sheen spotted off the coast of eastern Maine.

Petty Officer Monika Gogola told the Bangor Daily News the sheen was spotted today off the coast of Jonesport, by a Coast Guard helicopter crew on routine patrol.

Gogola said the spill appeared to be about a mile long and only 25 yards wide. Coast Guard vessels were sent to investigate.

Officials said no boats were reported in the area and that there were no signs of debris around the sheen.