SBS9300 broke down along amk ave 8 (just before the entrance to
YCK terminal). rear tyre puncture.... bc drove the bus slowly into
YCK terminal and stop at the alighting berth... leaving behind the
scratch mark on the road surface.

Looks like tyre carcass failed and tire exploded. Seen numerous
times on tag axles of VOs. Once saw one the tire exploded(the
aftermath only) and pieces landed on the road.