A 37-year-old man was arrested on Tuesday after posting explicit threats against St Pius X Parish and its school in suburban Philadelphia, telling police: “You never know when someone is going to randomly come shoot up the place,” while the church was in use for Mass. Cristopher Henderson faces felony terroristic threats charges after writing on social media: “I’m sending all you [expletive] to hell.”

Parishioners reported the posts, prompting police to intercept him while he was driving towards the church. Officers had already questioned him on Sunday after he made similar remarks on the parish grounds, asking them: “Do you come here every Sunday or is this just for me?”