WASHINGTON -- A water rescue operation has been suspended for the night at the Triadelphia Reservoir at the Montgomery County-Howard County border.
A 19-year-old man swam in the reservoir with a group before 6 p.m. Wednesday and went missing. Witnesses say he went underwater and did not come up for air.
Swimming in that reservoir is not allowed.
"It's unlikely that it's a rescue operation at this point," says Montgomery County Fire and Rescue spokesman Pete Piringer, "but we're holding out."
© 2014 WTOP. All Rights Reserved.