UPDATE 4-Activists disrupt key Canada-U.S. oil pipelines
* Activists attempted to shut five key crude pipelines
* Rare simultaneous action to close valves, stop oil flow
* Action in support of protest against Dakota Access pipeline
* Firms shut pipeline, aiming for quick restart (Adds market impact, no damage reported)
By Nia Williams
CALGARY, Alberta, Oct 11 (Reuters) - Climate-change activists on Tuesday disrupted the flow of millions of barrels of crude from Canada to the United States in rare, coordinated action that targeted several key pipelines simultaneously.
Activists in four states were arrested after they cut padlocks and chains and entered remote flow stations to turn off valves in an attempt to stop crude moving through lines that carry as much as 15 percent of daily U.S. oil consumption. The group posted videos online showing the early morning raids.
Protest group Climate Direct Action said the move was in support of the Standing Rock Sioux Tribe, which has protested the construction of a separate $3.7 billion pipeline carrying oil from North Dakota to the U.S. Gulf Coast over fears of potential damage to sacred land and water supplies.
Officials, pipeline companies and experts say the protesters ran the danger of causing environmental damage themselves by shutting down the lines. Unscheduled shutdowns can lead to a build-up of pressure and cause ruptures or leaks, they said. Continued...