Mong Kok, Tsim Sha Tsui MTR stations close as Hong Kong marks Christmas Eve with return to tear gas on streets and protest chaos in malls

• In shopping centres citywide, groups also gather to chant protest slogans, as unrest spreads to Mong Kok
• Police chief visits officers on duty earlier, calling on ‘black-clad rioters’ not to bring destruction back on the streets for Christmas