TROUTDALE, ORE (KATU). â?? Police say a gunman opened fire at Reynolds High School on Tuesday morning, killing one student.(You can watch live coverage on the shooting here and for the latest on the developing story visit our sister station KATU.) The Multnomah County Sheriff's Office said the gunman is also dead and the situation has stabilized. Authorities have not said how the gunman died. Multiple students told KATU that physical education teacher Todd Rispler was grazed by a bullet, but was still able to walk. Police have not confirmed that Rispler was shot. "Today is a very tragic day for the city of Troutdale and the Reynolds School District," said Troutdale Police Chief Scott Anderson. "The student has died. I'm very, very sorry for the family." The names of the shooter and the victim have not been released. Gresham police said via Twitter that there was one shooter, contrary to earlier reports that there were more. Police from multiple agencies responded to a report of an active shooter at Reynolds High School just after 8 a.m. A SWAT team and FBI agents also arrived at the school. A LifeFlight helicopter landed at the school and a large number of police officers were surrounding the building with guns drawn. LifeFlight dispatchers said the helicopter did not take anyone to a hospital and was cleared to leave. At 9:15 a.m., the sheriff's office said the situation had stabilized and the shooter was dead. Tactical teams were evacuating students and staff. â??There are no words to fully express our sorrow over the shooting at Reynolds High School," Portland Mayor Charlie Hales said in a statement. "We want the students, the parents and the educators â?? in fact, the whole community â?? to know that they are in our hearts and our prayers today. A prayer vigil is planned and will be held at the Greater Portland Baptist Church at 7:30 p.m. For the latest on the developing story visit our sister station KATU.