Shanghai residents forced from their apartments so State can use them as temporary quarantine facilities
Videos of this are viral. (A few dozen it looks like) citizens clashing with police (police in white non-contamination suits). Wrestling as the police take away people protesting (I don't think you can even call this 'protesters').
In another video a few dozen people assembled on a street in a protest against the closure of a school to be used as a quarantine facility. Police broke them up and forced them off the streets.
Frustration and anger, leading to violence.