One student has died and another is in critical condition after a shooting outside of a Minnesota school, according to local authorities. The pair of students—who have not yet been publicly identified—were shot just outside the front doors of the South Education Center, Richfield Police Chief Jay Henthorne said during a news conference. The incident remains under active investigation, he said, after suspects fled the scene shortly after firing shots around 12 p.m. outside of the Richfield school of roughly 200 students in pre-K up to age 21. Special Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives said they were joining local law enforcement in response to the shooting, which saw a swarm of authorities patrolling the area on Tuesday afternoon. Superintendent Sandra Lewandowski said that both students at the school, which serves students in both special education and alternative learning programs, received medical care for their injuries. “This is a terrible tragedy and loss, we’re deeply saddened by this incident,” she said. “No one should ever have to respond to a tragedy like this.” The school was in the process of being evacuated on Tuesday afternoon.