Minneapolis school shooter had anti-Trump message scrawled on gun

(NewsNation) — A "manifesto" posted by the shooter who opened fire at a Catholic school Wednesday, killing two children and injuring more than a dozen, showed they wrote several messages on weapons and ammunition, including one that read "kill Donald Trump," authorities said.

The video was posted to YouTube by Robin Westman, who has been identified as the person who attacked Annunciation Catholic Church in Minneapolis during a morning Mass, police said.

Minneapolis Police Chief Brian O'Hara said Westman had "some sort of manifesto that was timed to come out on YouTube, it's been taken down, and our investigators are going through that to try to develop a motive."

In the video, the shooter films several guns, including a rifle and a pistol, for what appears to be a detailed, planned attack. The shooter also shows a bevy of bullets and gun magazines. 

The firearms and magazines had notes and drawings scrawled in a silver pen. 

One read “kill Donald Trump,” according to the Department of Homeland Security. Another had the names of other mass shooters. Some weapons and magazines also had racial and antigay slurs written.   

The shooter appeared to be fixated on guns and pans the video to an arsenal of weapons and firearms equipment, including used target paper and shooting gloves.

Police said Westman was armed with a rifle, shotgun and pistol and approached the side of the church. They shot through the windows toward the children sitting in the pews. 

Westman, who was in their early 20s, shot themselves behind the church, authorities said. The motive for the shooting is still under investigation.

The two children killed were ages 8 and 10. Fourteen of those injured were also children, police said. 

Annunciation School serves pre-kindergarten through eighth grade. Classes began on Monday, and the school was scheduled to have an all-school Mass on Wednesday morning.

“Don’t just say this is about thoughts and prayers right now,” Minneapolis Mayor Jacob Frey said at a news conference outside the school. “These kids were literally praying. It was the first week of school. They were in a church.”

The Associated Press contributed to this story.