Hong Kong (CNN) Two mechanics have been arrested after an escalator packed with people in a Hong Kong shopping mall suddenly went into reverse. Police say the suspects may have tampered with the machine's parts after the Saturday incident, which sent shoppers tumbling. Eighteen people were injured when the escalator at Mong Kok's Langham Place switched direction from up to down. The mechanics, aged 22 and 52, are facing charges of obstruction of justice, police said. "The arrest of our mechanics was a surprise," Ian Fok, a spokesman for the Otis Elevator Company, which employes the two men, said in a statement.

Source: CNN March 27, 2017 12:11 UTC