The school was locked down for about 10 minutes Friday morning.
The magazine contained 9mm rounds.
State leaders don't expect to see results from the orders until the third or final week of the shutdown.
The CEO says it could end up temporarily laying off 4,000 workers.
More guidance is coming.
There are more than 1,500 people with COVID-19 hospitalized in Minnesota.
Osterholm believes much stricter mandates are needed to slow the pandemic.
It's unclear if bars and restaurants will face further restrictions.
Health officials say they're hoping to avoid another lockdown, but need people to stick to the advice already out there.
Wisconsin is one of the country's worst hotspots or COVID-19 cases.
It happened shortly before 9 p.m.
A boy was taken into custody.
The fight and lockdown happened around noon Thursday.