Several craft, each glowing like fire and triangular in shape. Slowly increased speed and vanished into the night sky.There were several craft coming from the North West sky in Coon Rapids, MN. They were basically in a formation as far as travelling through the sky. Some were single and some flew in pairs or in triple formation. They were glowing bright orange almost like fireballs. They were at a fairly low level and not at a great rate of speed. Although as they passed overhead towards the Blaine Airport (Southern direction) their speed increased, the brightness of the "fireball" dimmed and they pretty much vanished into the night sky. They were totally silent. Stealth silent. I tried to get their attention by the flashing light on my phone, but it did not really seem to affect the pattern they were travelling, or speed. They pretty much paid no attention to it. We stood outside hoping to see more flying over but no more were seen. Very interesting.