GRAND FORKS, N.D. (AP) _ Police say preliminary results show that a Grand Forks mother shot and killed her three children and then took her own life.

Astra Volk and her children, 14-year-old Tyler Talmage, 10-year-old Aidan Talmage and 6-year-old Arianna Talmage, were found dead in a rental home Thursday morning after a school asked police for a welfare check. All had gunshot wounds.

Police said in a news release issued Monday that no additional suspects are being sought. The investigation remains open.

Court records show Volk was divorced and had struggled to pay off medical bills.

Family, friends and neighbors shared stories Sunday evening at a vigil held outside the home. Volk's mother, Elizabeth Richards, urged people dealing with mental health issues to get help.

More From AM 1240 WJON