India, Aug. 27 -- Two children and the shooter were killed while 20 others injured in a gunfire incident that occurred on Wednesday morning at the US's Minneapolis Catholic school, Minnesota Governor Tim Walz said.

The shooter was among those killed, a US Justice Department official told Reuters.

Children were present at a morning mass when the shooting happened, according to reports.

"I'm praying for our kids and teachers whose first week of school was marred by this horrific act of violence," Walz wrote on X.

Police, FBI, and other federal agents rushed to the school, and students were evacuated.

The shooting occurred two days after school started at Annunciation Catholic School, a private elementary school with about 395 students....