Medelpad is one of the few areas in Sweden, according to Lars Forsgren at Medelpad's rescue service, who has access to an underwater robot.

The staff has test driven it in Selångersån and in Sidsjön and so far the feeling is positive.

- It is good to be able to test it in peace and quiet, because when it gets sharp, we want to feel comfortable in how we control it, says Lars Forsgren.

See when the underwater robot is tested in Sidsjön in the video above.