British Greenpeace activist Anthony Perret, who was held in Russia following a protest over the country's Arctic drilling, said he was "chuffed" to be released.
Greenpeace's Arctic Sunrise Twitter feed states:
Anthony Perret, got out an hour ago, tells us "Chuffed to be out, it's quite nice really". #FreeTheArctic30
Great news: Kieron Bryan, the second Brit, has been released on bail in St Petersburg #FreeTheArctic30
More top news
Michael Swain says the 'fantastic' surgery has made a huge difference to his life.
The brother of a teen who disappeared in 1979 has told ITV News he is "convinced" he was a victim of an alleged Westminster paedophile ring.
A newly discovered defence system in the South American animals has excited scientists looking to develop the first effective HIV vaccine.