Multiple people are wounded after a shooting Wednesday morning at Timberview High School in Arlington, police say.
Mansfield ISD confirmed in a letter to parents that police are investigating an active shooter situation at the high school.
The letter added that students and staff were locked in their classrooms and offices and that no visitors were being permitted.
NBC 5 crews have seen officers with long guns running from the parking lot into the school.
Agents with the FBI’s Dallas office also responded to the scene to see how they might be able to assist with the response.
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Source: NBC DFW