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
We've been in awe with all the pictures you've been sending us. Here's as many as we can fit!
A mother whose son died taking a so called "legal-high" drug, is calling for them to be banned to save other young lives.
An exclusive ITV opinion poll shows the Lib Dems are facing electoral wipeout in the South West.