The remand order, which runs until Friday, was issued by magistrate Teoh Shu Yee at the Alor Gajah magistrates’ court, Bernama reported.

The case is being investigated under Section 42(1) of the Road Transport Act 1987 (for reckless and dangerous driving) and Section 15(1)(a) of the Dangerous Drugs Act 1952.

The suspect was arrested after he surrendered himself at the traffic investigation and enforcement division of the Alor Gajah district police headquarters at about 12.10pm yesterday.

Alor Gajah police chief Ahmad Abu Bakar said initial investigations revealed that the incident was believed to have occurred at around 3.50 am while the express bus was travelling from Ipoh to Johor Bahru.

He said a urine check was positive for methamphetamine.

On April 16, a one-minute and 20-second video went viral on social media, showing the driver operating the bus in an unsafe manner and failing to give full attention to the road.

Express bus operator Billion Stars Express said the driver had been suspended with immediate effect after receiving a complaint on the incident.