China's industrial and tech hub of Xian has reported more than 100 new cases of Covid-19, taking its tally of locally transmitted infections to the highest in any Chinese city this year.

Xian has reported 155 new local cases for December 29, official data shows. That takes its number of local infections to more than 1,100 since the flare-up began on December 9, compelling authorities to put the city of 13 million under lockdown.

Read more from Reuters here.