Alex Harris was on the Arctic Sunrise ship when it was seized last Thursday.

Thirty of the crew, including Devon engineer Iain Rogers, are being held at gunpoint, according to Greenpeace.

Ms Harris' mother, Linda - from Dolton in Devon - said she had not heard from her daughter since an email last Wednesday and fears for her safety.

The ship was seized after four activists tried to board a Russian oil platform to prevent drilling activity and is being taken to Murmansk said Greenpeace,

Ms Harris works for Greenpeace in communications.

She was hoping to see polar bears, she did not envisage this sort of thing would happen”

Mrs Harris said: "Alex emailed us when the activists were captured to say she was safe and well," she said.