Crews are investigating after receiving a report of a missing man on Monday.
As of 9:30 p.m., Harwich Police say nothing was found and all emergency assets cleared the area
Authorities responded to Red River Beach around 6:15 p.m. looking for a 30-40-year-old Caucasian man who may be in the water.
The man was last seen on the jetty wearing black pants and a black sweater with white stripes, according to investigators.
Anyone who was at Red River Beach around that time and has pertinent information is asked to contact Harwich Police.
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