India, Aug. 29 -- The gunman who killed two Catholic school children and wounded more than a dozen others at a Minneapolis church this week had once been a student at the same school and a member of the parish, authorities said Thursday.

While talking to NBC, Minneapolis police chief Brian O'Hara said investigators were analyzing videos, writings and digital evidence belonging to 23-year-old Robin Westman but had not yet determined what triggered the attack.

"Everything we've seen so far is a classic pathway to an active shooter," O'Hara told the news channel. He added that investigators had found nothing "specific to trigger the amount of hate that occurred yesterday."

Meanwhile, the shooter's mother previously worked for the parish u...