City leader says autonomous transport systems are a global trend and authorities will work hard to ensure they are safe for use in Hong Kong

Hong Kong’s leader has pledged to find out the cause of a crash involving a pair of unmanned buses at the city’s airport, as he reassured residents that authorities will closely supervise companies testing driverless technologies.

Chief Executive John Lee Ka-chiu on Tuesday also said that autonomous transport systems were becoming a trend globally and that authorities would work hard to ensure they were safe for use in Hong Kong.

On Sunday, a pair of driverless buses used to transport staff collided in a restricted area of the city’s airport.

“They must find the cause of the incident, so they can prevent this from happening again,” Lee said ahead of his weekly meeting with the government’s top decision-making Executive Council.