Rapper Guru of Gangstarr fame suffered a heart attack and is in a coma, several sources have told AllHipHop.com.

While details remain sketchy, the rapper apparently suffered the heart attack in New York City and is in serious condition.

Guru, real name Keith Elam, is a founding member of Gangstarr, which also features legendary producer DJ Premier.

Questlove of The Roots said via twitter, "So Primo confirmed on Sirius radio that Guru had heart attack and is in a coma and will undergo surgery tomorrow."