Ten Greenpeace activists abseiled down Scotland's Forth Road Bridge to protest plastic plant owned by Manchester United owner Sir Jim Ratcliffe.
The group said it wanted to block an Ineos tanker carrying fracked gas to a plastics plant at Grangemouth.
The site is near Edinburgh and part of Ineos - a company owned by Sir Ratcliffe that produces virgin plastics.
The activists suspended themselves using ropes 25 metres from the water level at high tide and held banners saying, 'Plastics Treaty Now'.
The stunt has already halted traffic but the group say they plan to stay in place for 24 hours - using hammocks to make themselves comfortable if they need to.
