A 46-year-old man from Keswick has been arrested on suspicion of arson following a fire in the town.
The man is being questioned by detectives at Workington police station.
The fire, which damaged three properties on Windebrowe Avenue, happened on Friday night.
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Carlisle have secured their Football League status by beating Plymouth Argyle 2-0 at Brunton Park.
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Carlisle are preparing for game that could see them safe from relegation. They welcome Plymouth Argyle to Brunton Park for a 3pm kick-off.