Ukrainian defense forces are detecting and removing explosive devices with help from a small dog.

The State Service of Ukraine for Emergency Situations shared a video documenting its demining unit’s efforts to Twitter on Monday, April 4.

In the northern city of Chernihiv, which is roughly 91 miles away from Kyiv, a uniform-equipped Russell Terrier named Patron has been sniffing out undetonated bombs in wooded search sites.

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Dog detects bomb underground in Ukraine

A small Russell Terrier named Patron is helping the State Service of Ukraine for Emergency Situations find undetonated bombs in Chernihiv, according to a new Twitter video the agency uploaded on Monday, April 4, 2022. (State Service of Ukraine for Emergency Situations/Reuters)

The Ukrainian defense agency reports that the explosives were left by Russian troops.

"Be aware, look under your feet," the agency said in a portion of its tweet, which is written in Ukrainian.

In the State Service of Ukraine for Emergency Situations’ 47-second video, Patron appears to lead the demining unit as they navigate the woods. 

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When Patron detects an item he finds suspicious, the dog stops and barks to notify his human handler. The video also shows that Patron digs in the ground alongside a demining specialist.

Patron has been credited with digging up 90 explosive devices in the area, according to Fox News Channel's "The Five."

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Dogs have been used to carry out tasks in war zones around the world for centuries, but there was a significant increase in canine helpers during World War I, according to the American Kennel Club.

Russia and Ukraine have been at war since Feb. 24, 2022.

Shelling has occurred in a number of major cities. As of Monday, more than 4.2 million Ukrainians have fled their home country to escape the ongoing war, according to the United Nations Refugee Agency. 

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Reuters reports that Russian officials announced it would scale back forces around Chernihiv and Kyiv last week.

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Viacheslav Chaus, Chernihiv’s regional governor claims that there were still some Russian troops present in his governing area on Monday, according to Reuters.