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GAITHERSBURG, Md. (WUSA9) -- Family, friends and neighbors of a missing Gaithersburg man spent part of their weekend searching for clues along the C & O Canal and posting flyers asking for help.

Fifty-four-year-old Martin-John Rogers was last seen Thursday when he left his home on Riffle-Ford Court to go to work in Rockville. He is an NIH researcher.

Police have received several calls with possible sightings near the towpath.

His car, a 2001 Audi A-4 with Maryland tags, has also not been found.

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