Posters are displayed in exterior windows at Valley View Elementary School, the school attended by Liam Conejo-Ramos, on Monday in Columbia Heights. The school is part of Columbia Heights Public Schools, which canceled classes for the day after district officials reported a threat made against the school community, prompting increased police presence and an investigation by local law enforcement. Kerem Yücel | MPR NewsCreate an account or log in to save stories.Thanks for liking this story! We have added it to a list of your favorite stories.This story is part of our live coverage. Go to live updates.