Hertfordshire’s lead fire investigation dog who has helped investigators uncover the cause of multiple fires has died.

Hertfordshire Fire and Rescue has been “saddened” by the death of Thor, who passed away due to a medical condition earlier this week.

Thor joined Hertfordshire Fire and Rescue in 2019 to train alongside fire dog Reqs, learning to investigate the cause of deliberate fires in Hertfordshire and the surrounding area.

He became Hertfordshire’s lead fire investigation dog in September this year.

Watford Observer: Thor the fire dog (image Thorfiredog Instagram/Hertfordshire Fire and Rescue)Thor the fire dog (image Thorfiredog Instagram/Hertfordshire Fire and Rescue)

Watford Observer: Thor the fire dog at work (image Thorfiredog Instagram/Hertfordshire Fire and Rescue)Thor the fire dog at work (image Thorfiredog Instagram/Hertfordshire Fire and Rescue)

Executive Director of Community Protection and Chief Fire Officer Alex Woodman said: “We are saddened to hear of the passing of Thor, our fire investigation dog. Thor has assisted fire investigators at countless incidents in Hertfordshire and neighbouring counties.

“Our thoughts are with Nikki Harvey, Thor’s handler and fire investigator, at this difficult time.”

Plenty of people took to twitter to pay their respects to Thor after Hertfordshire Fire and Rescue announced he had died on social media on Tuesday.

Watford Observer: Thor the fire dog (image Thorfiredog Instagram/Hertfordshire Fire and Rescue)Thor the fire dog (image Thorfiredog Instagram/Hertfordshire Fire and Rescue)

One said: “Very very sad and a massive loss, fantastic dog and part of a great team condolences to Nikki.”

Another said: “So sorry to learn about the passing of Thor, such a special little soul. Thinking of Nikki and the rest of the team.”

Another added: “Very sad day, so sorry for all in HF&RS.”