"We are shocked and filled with overwhelming grief over the untimely passing of our dear friend, family member and band member Andy 'Fletch' Fletcher."
writes the band on his Twitter.
They describe the deceased colleague with praise and direct their support to his family.
Fletcher turned 60 years old.
Andy Fletcher was an English keyboard artist, DJ and one of the founders of the electronic pop band Depeche Mode.
The band had their first public gig in 1980 and have since produced music and toured until 2018.