Hundreds of green campaigners blockaded the road to an oil refinery in Essex and claimed to have prevented more than 50 oil tankers from travelling to and from the site.
Police were forced to close the road leading to the Coryton Oil Refinery near Stanford-le-Hope, Essex, when 12 female protesters handcuffed themselves to vehicles parked to deliberately hold back fuel tankers, with hundreds of others from the group Crude Awakening joining in.
The protesters, who were accompanied by hundreds more demonstrators from London, claimed they stopped 375,000 gallons of fuel from leaving the depot - in a protest against climate change.
There were minor scuffles between officers and activists, but Essex police described it as "a peaceful protest".
A police spokesman said: "There have been no incidents during the protest and no arrests have been made."
The demonstration, which remained on the road for more than seven hours, was supported by a number of action groups including Camp for Climate Action and Plane Stupid and is part of a global week of action against the fossil fuel industry.
Activist Julie Allen said: "We've come here to the source of the problem, to put our bodies in the way of the relentless flow of oil to say 'no more'.
"If we're to have a hope of tackling climate change we need to find a way to get over oil. It won't happen overnight, but we can, and must move beyond oil."
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