Austrian police said Tuesday they were responding to reports of shots fired in a school, the BORG Dreierschützengasse, in the city of Graz.

“The reason for the deployment was heard gunshots in the building,” the Styria State Police said in a message posted on social media.

Several emergency vehicles, including Cobra tactical vehicles, were traveling to the site, police said.

This is a developing story. Please check back for updates.