Investigators say that the attacker who opened fire on pupils as they were praying at a church in Minneapolis was "obsessed with the idea of killing children".
The attacker, who killed two children ages eight and 10 and injured 18 others, did not seem to have any specific motive, according to Minneapolis Police Chief Brian O'Hara.
She "appeared to hate all of us", the chief said on Thursday, adding: "More than anything, the shooter wanted to kill children".
Officials have released few details so far about the suspect's background, but say she previously attended the church's school and had a mother who had worked there.
The suspect, identified as Robin Westman, is believed to have approached the side of the Annunciation Church, which also houses a school, and fired dozens of shots through the windows using three firearms. Police also found a smoke bomb at the scene.
