PAWTUCKET, R.I. (AP) — A shooting during a Rhode Island youth hockey game left three people dead, including the shooter, and three more hospitalized Monday night in critical condition, authorities said.

Pawtucket Police Chief Tina Goncalves told reporters that someone helped bring a swift end to the violent scene Monday afternoon by intervening and trying to subdue the shooter, who was at an arena to watch a family member’s hockey game. The shooter died from an apparent self-inflicted gun wound, she said, noting that authorities were still investigating.

“It appears that this was a targeted event, that it may be a family dispute,” she said.