LIHUE >> Kauai County officials say disciplinary action has been taken after a Fire Department boat was used for a fishing expedition to waters along the coast of Niihau.

The activity was caught by a video camera crew set up by the island’s owners to try to stop illegal trespassing.

Island co-owner Keith Robinson told Mayor Bernard Carvalho Jr. in a letter that catching the boat, apparently loaded with firefighters fishing and diving close to Hawaiian monk seal haven, was unexpected.

County spokeswoman Mary Daubert told the Garden Island newspaper that Carvalho asked Fire Chief Robert Westerman to conduct an investigation, which resulted in disciplinary action.

Daubert says she couldn’t discuss what action was taken because it’s a personnel matter.