Michigan school districts are canceling classes this week in response to threats of violence after the deadly Oxford High School shooting on Tuesday.

Among those that announced closures for Thursday and Friday are Bloomfield Hills School District, Holly Area Schools, Troy Schools, Rochester Community Schools, Brandon School District, Walled Lake Consolidated Schools, Lake Orion Community Schools, Clawson Public Schools, Warren Consolidated Schools, Hazel Park Schools, Avondale School District, West Bloomfield School District, and Lamphere Schools.