A Dumfries and Galloway Police spokesman said:
“The causes of the fires are being investigated. We are anxious for anyone with information to come forward so that whoever is responsible can be apprehended.”
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Carlisle have secured their Football League status by beating Plymouth Argyle 2-0 at Brunton Park.
Kerrie brings you Saturday night's forecast
Carlisle are preparing for game that could see them safe from relegation. They welcome Plymouth Argyle to Brunton Park for a 3pm kick-off.