The Coast Guard and dive teams respond to Red River Beach in Harwich Monday evening where a man may have jumped off the jetty.
The man was last seen on the jetty at around 6:15 p.m.
Police describe the subject, described as a 30 to 40-year-old white man wearing black pants and a black sweater with white stripes.
Anyone with information is asked to call the Harwich Police Department.
(Photo: Harwich Police Department)