CHICAGO (CBS) — After taking on water in choppy conditions, a boat had to be guided back to shore by the Coast Guard early Thursday morning in Winthrop Harbor.

Winthrop Harbor Fire Chief Justin Stried said around 3:30 a.m. authorities received a call about a private boat taking on water about one mile east of Northpoint Marina.

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The vessel was not able to make it back to shore, so the Winthrop Harbor Fire Department’s emergency rescue boat and two divers went out to make a rescue.

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However, they started taking on water themselves about 25 to 50 yards outside the marina breakwall, so they called for help from the U.S. Coast Guard.

A Coast Guard rescue boat out of Kenosha later arrived to assist the boat in distress and tow the 24-foot sailing boat back to the marina.

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The passengers were not injured.