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BOYNTON BEACH, Fla. – Officials with the U.S. Coast Guard are searching the Atlantic Ocean about one mile from Boynton Beach, Florida, following reports of a small plane crash.

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Initial reports indicated the plane had crashed and was sinking, but rescue crews have not been able to locate the plane as of 9:30 p.m. ET Sunday, WPLG reported.

According to WPBF, the crash occurred at around 8 p.m. Officials told the Palm Beach TV station that the plane is a Piper 28 and seats four passengers, but it was not immediately known how many people were on the flight.

A U.S. Coast Guard helicopter, small boat and cutter are in the area conducting a search and rescue mission, WPLG reported.

Check back for updates to this developing story.