A Columbus police officer shot and killed his K-9 partner Saturday morning after the dog attacked him during a training exercise.

Officer Brian Carter was training with his K-9 partner Benzi, a 3 1/2-year-old Belgian Malinois, just before 9 a.m. at the Columbus Division of Police K-9 office, according to police. When Carter was correcting Benzi’s behavior through verbal commands, the dog attacked him.

Carter fired at the K-9 after receiving serious bites to his arms, according to police.

Carter was taken to OhioHealth Grant Medical Center in stable condition, where he underwent surgery for his injuries. Benzi was taken to MedVet, where he was euthanized.

This is the first time a Columbus police K-9 officer has shot a K-9 partner, said Sgt. Mark Cartwright, supervisor of the department’s K-9 unit.

Benzi was in service with the Columbus police for two years. Carter has been with Columbus police’s K-9 unit since 2008. Benzi was his second K-9 partner.