A group that rallies for the families of May 13 tragedy victims has renewed calls for a royal commission of inquiry (RCI) into the racial riot, which saw hundreds killed.

Persatuan Sahabat Warisan Kuala Lumpur dan Selangor (Pesawa) said the country needs to have an open discussion on the incident so the people can move on from the 1969 bloodshed.

"Yes, we need to have an RCI. We should...