Mexican prosecutors are investigating the death of a 10-year-boy who was shot inside a movie theater here, the capital district attorney’s office said.

Hendrik Cuacuas, his sister and their father were watching a film at the Plaza Ermita cinema in Mexico City’s Iztapalapa borough on Nov. 2 when the kids’ dad “heard a buzzing near his ear” that was quickly followed by a thunderous pop, the DA’s office said in a statement.