WATERVILLE — A chihuahua is dead after being attacked Monday afternoon by a German shepherd that escaped from its owner’s house on Water Street, police said.

Kilo, the 4-year-old German shepherd, pushed its way through a basement window at about 2:30 p.m. while its owners were at work, according to Bill Bonney, deputy chief for the Waterville Police Department. Once outside, Kilo encountered a mailman and became aggressive, which prompted the mailman to pepper spray the dog.

After being sprayed, Kilo attacked a neighbor’s 14-year-old chihuahua, Paco, who was dead by the time authorities arrived.

Kilo’s owner, Randy Lyon, 23, of Waterville, has been charged with a civil violation of keeping a dangerous dog and must keep Kilo quarantined at the residence for 10 days.

Punishment for a violation of keeping a dangerous dog can range from euthanasia of the dog, a ban on dog ownership, confinement of the dog to an enclosed space or required posting of dangerous dog signs outside the residence.

Lyon is expected in court Dec. 17.