Pupil protests have led to a confrontation with police at a barricaded high school. Tear gas was fired by police during the incident. The protests are part of ongoing demonstrations by pupils.

Further details about the protests and the police response are available from the South China Morning Post. The publication reports that the high school was barricaded as part of the protests.

The situation involves pupil protests and a police response, with tear gas being used to address the barricaded high school. For more information, readers can refer to the South China Morning Post.