Authorities looking for motive of attacker who killed children in Minneapolis

People gather at a vigil at Lynnhurst Park after a shooting at the Annunciation Catholic School in Minneapolis (Bruce Kluckhohn/AP)

Investigators are examining the videos, writings and movements of the attacker who fired through the windows of a Catholic church in Minneapolis, killing two children and wounding 17 people, for connections to the church and its school to understand the motivation for the attack.

Armed with a rifle, shotgun and pistol, 23-year-old Robin Westman shot dozens of rounds on Wednesday morning towards the children sitting in the pews during Mass at the Annunciation Catholic School, Minneapolis police chief Brian O’Hara said.