China's major financial hub of Shanghai has reported more Covid-19-related deaths, as residents vented their anger over a harsh lockdown and strict censorship online.

The city, battling China's biggest coronavirus outbreak so far, reported 12 new Covid-19 deaths, up from 11 a day before.

On social media, netizens battled against censors overnight to share a six-minute video entitled “The Voice of April”, a montage of voices recorded over the course of the Shanghai outbreak, Reuters reported.

All direct references to the film were removed from the Weibo microblogging service by today morning, though some comments criticising the censorship survived.