HOPKINTON, MASS. (WHDH) - Officials in Hopkinton are searching for a 21-year-old who went missing Friday night while swimming at Sandy Beach.

Officers said a friend swimming with the missing man called 911 around 8 p.m. when he returned to shore alone from a swim in Lake Maspenock. Police said the swimmers went beyond the safe-swimming zone at the beach. 

In a statement, officials said this is “now considered a recovery operation,” and Hopkinon and other area fire responders are searching the waters with sonar-equipped rescue boats.

Hopkinton police and fire crews searched until midnight Friday, and then resumed Saturday morning. 

The beach is closed until further notice.

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