Jacob Clarke, 31, was arrested and charged after a family member told police he threatened to shoot kids at a Groton school, police said.

Groton police said that the 17-year-old had been driving with an elevated blood alcohol level and had been going above the speed limit.

Groton schools have ramped up security measures following last week’s arrest of a man who police say threatened to shoot kids at a local school.

Groton police say two suspects were charged after one allegedly made comments threatening violence against a local elementary school. Jacob Clarke, 31, of Groton, was charged with first-degree threatening/hazard to terrorize and second-degree beach of peace.