Two technicians arrested after an escalator accident that left 18 shoppers injured are suspected to have tampered with one of its key braking systems during an official inspection last week to determine the cause of the incident, sources said.
The auxiliary braking system should have been turned on at the time of the accident, but it was possible it was not, a government source said, which could have caused the incident.
The pair, aged 22 and 52, from Otis Elevator Company (Hong Kong...
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