Devo frontman Mark Mothersbaugh has expressed his shock at the death of bandmate Bob Casale, who died on Monday (17Feb14).

l The 61-year-old guitarist had been suffering from health complications which led to heart failure, and Mothersbaugh cannot believe his longtime pal is gone after working so closely with him for 40 years in the band and at his production company Mutato, where they scored soundtracks for a string of big and small screen projects.

Marking the sad loss with a statement on the company's website, Mothersbaugh writes, "We are shocked and saddened by Bob Casale's passing. He not only was integral in Devo's sound, he worked over twenty years at Mutato, collaborating with me on sixty or seventy films and television shows, not to mention countless commercials and many video games.

"Bob was instrumental in creating the sound of projects as varied as Rugrats and Wes Anderson's films. He was a great friend. I will miss him greatly."