PETALING JAYA: Former senator Tunku Abdul Aziz Tunku Ibrahim has passed away at the age of 89.

The news was confirmed by his nephew, Datuk Tengku Azman Tengku Zainal Abidin, in an Instagram post.

Tunku Abdul Aziz joined DAP in 2008 and served as its vice-chairman. However, he quit the party in 2012 and became one of its most vocal critics.