Funkmaster Flex shared news of his death on social media.

Credit: Johnny Nunez/WireImage

Big Kap, a New York DJ who notably released The Tunnel featuring big names like Tupac Shakur and Notorious B.I.G. in 1999, has died, his Tunnel collaborator Funkmaster Flex shared on Instagram Tuesday morning. His road manager later revealed to Billboard that he died from a heart attack. He was 45.

The Tunnel peaked at No. 35 on the Billboard 200, and, alongside tracks from Shakur and B.I.G., the collection featured verses by fellow rap heavyweights like Eminem, Dr. Dre, Jay Z, and Snoop Dogg. “We didn’t want to short ourselves on artists, so we put our heads together and went for what we like and the people we like,” Kap told MTV at the time.

Aside from putting out his own music, Kap was also known for DJing clubs. “When I’m DJing, I’m more concerned about the room,” he told MTV in the same interview. “So I’m playing the more cutting-edge stuff that people like, going with the cutting-edge vibe and mixing it with old school and the hits.”

Multiple artists, including Questlove and Talib Kweli, have paid tribute to Kap on social media since news of his death spread. See those posts below.