According to Rolling Stone, Popa Wu died aged 63 and his cause of death is still unknown.

Popa Wu was also known as Freedum Allah, and featured on a number of Wu-Tang Clan group and solo tracks over the years, including "Wu-Revolution" (from Wu-Tang Forever), Ghostface Killah’s "All That I Got Is You", and Raekwon’s "North Star (Jewels)".

He was a key part in the formation of Wu-Tang Clan, and the older cousin of RZA, and a relative to GZA and Ol’ Dirty Bastard. Check out the tributes from the Wu-Tang Clan members below.

R.I.P. Popa Wu.

A post shared by GZA (@therealgza) on