The authorities were responding to reports of a shooting at a Catholic church in Minneapolis on Wednesday morning, law enforcement officials and Minnesota’s governor said.

The Bureau of Alcohol, Tobacco, Firearms and Explosives said on social media that its agents were at the scene of the reported shooting, the Annunciation Catholic Church, which has a school that educates children from prekindergarten through the eighth grade.

Governor Tim Walz of Minnesota said in a statement that the shooting had occurred at the Annunciation Catholic School.

“I’m praying for our kids and teachers whose first week of school was marred by this horrific act of violence,” Mr. Walz said.

This is a developing story. Check back for updates.