BERLIN (AP) — Disturbing the peace in a provincial German town: a colony of ants.

A 75-year-woman in the southwestern town of Offenburg called police at 3 a.m. Wednesday complaining that she couldn’t sleep because her doorbell was always ringing.

Police said officers dispatched to investigate the cause quickly tracked down the culprit: an ant nest next to the doorbell. They say the insects had built such a big home that the nest pressed the switching elements together, keeping the bell ringing.

Officers silenced it by removing the nest with a knife.