Portland, OR (NBC NEWS) --- A shooter shot one student killing them at a Portland, OR, high school Tuesday morning, authorities told NBC News. The gunman is also dead.
Police say the situation at Reynolds High School in Troutdale was "stabilized" an hour after initial calls came in around 10 a.m. central time.
The Multnomah County Sheriff's Office didn't immediately say if there were other victims or the extent of any injuries.
A number of emergency vehicles surrounded the school, and the facility was placed on lockdown. SWAT teams have been moving from room to room to take students out safely, KGW NBC affiliate reported.
It could take police up to two hours to clear the school and get parents reunited with their children, according to the Reynolds School District.
Troutdale Mayor Doug Dauoust said reports of gunfire were called in as the teachers and students were arriving to start the school day. He told MSNBC there were no known injuries at the time.
Students have final exams Tuesday and Wednesday, the last days of the school year, and some had yet to arrive to school for the morning.
Reynolds High is one of the state's largest schools, with more than 2,800 students.
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