Musicians Charlie Eccleston and Zaiga Gravenieks, were last seen leaving his flat on Tuesday evening as they went out to celebrate Halloween.
A spokesperson for Hertfordshire Police said: "Their families have been informed and are being supported by specially-trained officers.
They wish to extend their thanks to everyone that searched for Charlie and Zaiga and shared appeals for information on social media".
A file is being prepared for the coroner and we are not looking for anyone else in connection with their deaths.
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