Few Dozen Protesters Remain At Hong Kong Polytechnic University

The transcript describes the ongoing protest at Hong Kong Polytechnic University, where demonstrators, mainly students, have clashed with police. The protesters fortified the campus, leading to confrontations involving bows, arrows, and gasoline bombs against police tear gas and rubber bullets. Police issued evacuation orders, allowing minors to leave but arresting others, resulting in 1100 arrests. As of Wednesday, police surrounded the campus, waiting to detain remaining protesters.

What measures did authorities take regarding protesters under the age of 18?

What was the situation reported on Wednesday regarding the police and the school?