The 13 TB cases were spread out over the past three years.
The 25-year-old man is assisting police investigations.
She apologised and immediately moved to an empty seat in the front row.
It was a "freak accident", said Home Affairs Minister K. Shanmugam.
The 66-year-old woman was sent to the hospital due to bleeding.
Bridging buses were activated during the disruption.
It has a lengthy 92 years and one month left on its 99-year lease.
The driver of the lorry involved left the scene before the police arrived.
The accident caused eight bus services to be diverted.
The first fire involved discarded items along the common corridor, while a six-year-old boy is suspected of starting the second…