Looks like an official statement:
http://www.hollywoodreporter.com/new...actions-320420
"It is with great sadness that we confirm that musician, rapper, activist and director Adam 'MCA' Yauch, founding member of Beastie Boys and also of the Milarepa Foundation that produced the Tibetan Freedom Concert benefits, and film production and distribution company Oscilloscope Laboratories, passed away in his native New York City this morning after a near-three-year battle with cancer. He was 47 years old," Yauch's band mates Michael Diamond aka Mike D, Adam Horovitz aka Ad-Rock and Michael Schwartz aka Mix Master Mike said in a statement via their publicity company, Nasty Little Man.