The four explosives detection dogs added to the San Diego Sheriff's Department's K-9 unit. Courtesy San Diego County Sheriff's Department
The four explosives detection dogs added to the San Diego Sheriff’s Department’s K-9 unit. Courtesy San Diego County Sheriff’s Department

The San Diego County Sheriff’s Department has added four explosives detection dogs to its K-9 unit’s ranks, officials announced Friday.

The Labrador Retrievers, who are named Archer, Bear, Dexter, and Nalla, were trained in detecting explosives and firearms. They are considered a regional resource, which means they can answer calls from other law enforcement agencies.

“Their specialized roles make them essential in large crowd situations such as concerts, sporting events, festivals, parades, airports, transportation hubs, dignitary visits, active shooter incidents and other high-risk scenarios,” the department said in a statement.

“They can detect even the slightest traces of explosives materials and gun powder, providing a critical layer of protection in our communities.”

The dogs are each a year old, and each cost around $6,500.

City News Service contributed to this report.