Parents of two of the Greenpeace detainees being held in Russia said they felt encouraged by the ongoing support through the world for the Arctic 30.
Ann and Andy Bryan, parents of freelance photographer Kieran Bryan, were joined by Sue Turner, the mother of engineer Iain Rogers, outside a petrol station in Exeter.
Around 80 people joined the protest.
More top news
Second blast of wintry weather forecast for the UK says weatherman Alex Beresford.
Our political reporter Bob Constantine gives his view on George Osborne and David Cameron's visit to the West.
Brent Zillwood thought he'd never find love due to his condition but is now married to model Challis Orme who he met on the dating show.