Aaron Farinacci, 37, was arrested after a witness reported seeing him kneeling near the ignition site of a major fire in Washington State, officials said.

Despite the scale of the damage, there have been no reported fatalities in the fires that started over the weekend. Late on Monday, officials arrested a man suspected of setting one of the fires.

As the country holds its final greyhound race, the government has committed to finding homes for dogs and supporting people whose livelihoods depended on racing.