School Shooting in Canada Leaves 4 Dead, Including 23-year-old Teacher. Update: Suspect in Custody, Update: Marie Janvier, Adam Wood and brothers Dayne & Drayden Fontaine

Four people are dead and a suspect is in custody after a school shooting Friday in La Loche, in northern Saskatchewan, Canada. The shootings took place at a local home and high school. The victims have been identified as Marie Janvier, Adam Wood and brothers Dayne and Drayden Fontaine

Royal Canadian Mounted Police confirmed the deaths and arrest, according to the Saskatoon Star Phoenix, but have released few details about the incident, including a clear timeline of events, the identities of the victims or suspect or possible charges in the deaths.

Authorities first received a report about 1 p.m. local time about gunfire at La Loche Community School, according to CNN, and a suspect was in custody by 1:47 p.m.

The town’s acting mayor, Kevin Janvier, said that his 23-year-old daughter Marie Janvier was among the dead, according to the BBC, and that police had told him the suspect allegedly killed two siblings before allegedly opening fire at the school.

Authorities are investigating two locations, according to the CBC: The school and a nearby residence.

UPDATE I: Alleged La Loche shooter sent chilling chat messages about killing two people before heading to school.

Desjarlais-Thomas forwarded to The Canadian Press a screenshot of a chilling exchange that had taken place on social media a short time before the shooting between a young male and his friends.

“Just killed 2 ppl,” wrote the young male. “Bout to shoot ip the school.”

“Why?” asked a friend. “Why?”