Police arrested hundreds of Keystone XL pipeline protesters Sunday after they attached themselves to the White House fence with plastic ties.
The protesters demanded that President Barack Obama reject the pipeline because of environmental risks it might pose.
Some of the protesters wore white jumpsuits splattered with black ink to simulate oil and laid across Pennsylvania Avenue.
About 1,000 protesters took part, according to the U.S. Park Police, and nearly 400 were arrested.
The Keystone XL pipeline project is owned by TransCanada Corp.
If constructed along its full length, it would transport crude from Alberta’s oil sands to refineries on the U.S. Gulf Coast.
“Supporters of the $5.4 billion pipeline say it would create thousands of temporary construction jobs and improve U.S. energy security,” an AP report said.
Protesters say the pipeline could damage the environment through spills and could contribute to global warming by encouraging use of fossil fuels.The organizers of Sunday’s protest were students supported by environmental groups 350.org and the Energy Action Coalition, the AP said.
The protest began with a rally at Georgetown University and moved on to the White House.