VINALHAVEN — Investigators from the U.S. Coast Guard and the Maine State Ferry Service are working to determine why a ferry with 30 people aboard ran aground after leaving Vinalhaven on the way to Rockland.

Officials say there were no injuries among the passengers and crew on the ferry Everett Liberty and no pollution was released into the ocean.

WMTW-TV says the ferry terminal manager called the Coast Guard at about 9:25 a.m. Thursday to say the ferry had grounded in The Reach, near Norton’s Point.

A Coast Guard motor lifeboat escorted the ferry to Rockland where investigators met the vessel.

The Coast Guard says visibility at the time of the grounding was less than a quarter mile.