Two high school students are in custody this week over allegations they conspired to carry out a mass shooting on a San Antonio-area campus. The arrests come days after a person opened fire at a Catholic school in Minneapolis, killing two children and injured 17 others. The Schertz Police Department arrested the two juveniles Thursday after school administrators contacted Clemens High School’s resource officer about reports of two students threatening to carry out a mass shooting on the grounds, the department said in a Facebook post.