﻿[Updated, 9:41 p.m.] All 24 people taken hostage by an armed student on Monday have been released - unharmed - from a northeast Wisconsin high school, Marinette Police Chief Jeffrey Skorik said.

FULL STORY

[Original post, 7:12 p.m.] A student with a gun is holding an unknown number of people hostage in a classroom at Marinette High School in northeast Wisconsin, according to the Marinette County Emergency Management agency.

No injuries have been reported, and police are at the scene, the agency said in a statement.

A school administrator called police at 3:48 p.m. CT, reporting that an armed student had gone into a classroom and taken those inside hostage.

Law enforcement personnel urged parents who didn't know their children's whereabouts to go to the Marinette County Courthouse. The street to the high school was blocked off, according to CNN affiliate WBAY.

Marinette has about 11,400 residents, according to the U.S. Census Bureau. Bordering Lake Michigan, the city is just more than 50 miles north of Green Bay.