The authorities in Iceland have raised the alarm after thousands of salmon “escaped” from a fish farm.

Farmed ‘Norwegian’ salmon escaped from Arctic Fish farms and are believed to have since spread to many other rivers.

According to the Guardian there is a great environmental risk to the wild salmon species, which will likely mate with the farmed fish.

If this happens, the “offspring” of the cross may have characteristics that are unsuitable for survival in the wild, thus threatening the future of the wild salmon population.

An investigation is being conducted into the incident and the company’s executives are accused of “negligence” and improper guarding of the facilities – if found guilty they risk a prison sentence