The Denver School of the Arts was evacuated Tuesday morning due to a gas leak.

That’s according to a tweet from Denver Public Schools that was sent just before 11 a.m.

The district says all of the students and staff at the school are outside and safe.

The Denver Fire Department and Xcel Energy were called to the scene. It’s unclear what called the leak.

The Denver School of the Arts is located at 7111 Montview Blvd.