Hundreds of people gathered in malls and public places in Hong Kong on Friday in renewed protests against the city's police force for failing to respond promptly to a mob attack on train passengers at the Yuen Long train station last June.Holding banners that read "Never forgive, never forget," protesters gathered in the Central business district's Landmark mall. Others carried the banner of the pro-democracy movement, which reads "Liberate Hong Kong, Revolution in our time!"Similar protests were planned in Causeway Bay, Tai Koo and Quarry Bay districts on Hong Kong Island, with large numbers of riot police dispatched to Kwun Tong and Kowloon Bay across the harbor."Move it! Move along please! The police are working!" one police officer yelled at journalists filming their advance along a street in Kowloon Bay, raising a riot shield above his head. "Move back there!" shouted another.Meanwhile, social media photos showed protesters holding placards and "Revolution in our time" banners at a protest in Yolo Mall next to Yuen Long MTR.Democratic Party lawmaker Lam Cheuk-ting, who was attacked by gang members in white T-shirts at Yuen Long MTR station in the New Territories, said the attack was a turning point in the public's attitude to the police."After that, Hong Kong people no longer believed in the police force any more," Lam told government broadcaster RTHK. "I think it is very crucial for Hong Kong to find out the whole truth of the Yuen Long attack, why the police didn't deploy any officers to prevent the attack from happening."Hong Kong's Mass Transit Railway (MTR) operator closed its Yuen Long station on Friday.The white-clad attackers -- some of whom were later confirmed to have links to Hong Kong's criminal gangs, the triads -- laid into passers-by and passengers on a train in the station on June 21, 2019, beating them up with rods and sticks and leaving 45 people in hospital.White-shirted mob ran amok