(CNN) — An officer on Monday shot an armed 17-year-old student in a high school classroom in the Milwaukee suburb of Waukesha, Wisconsin, police said.

The suspect, who police said pointed a handgun at officers, is in stable condition, Waukesha Police Chief Russell Jack told reporters.

There we no other injuries in the morning incident at Waukesha South High School.

A school resource officer had rushed to a classroom after a student saw a classmate with a handgun, authorities said.

Other officers responded, and tried to start a dialogue with the suspect, Jack said. He said the suspect first refused to remove his hands from his pockets and ignored the officers. Then, he removed the gun from his waistband and pointed it at the officers, the police chief said.

One of the officers fired, striking the teen. Medical attention was administered, students were evacuated and the school was placed on lockdown, Jack said.

A gun was recovered from the scene.

School district Superintendent Todd Gray said, "This is a superintendent's worst nightmare."

The officer who opened fire was an 11-year veteran of the police department.