WASHINGTON — Environmental groups filed suit against the Obama administration on Wednesday, alleging that U.S. federal officials illegally allowed work on the Keystone XL oil pipeline to begin before the proposed project had been approved.

The Center for Biological Diversity, Friends of the Earth and the Western Nebraska Resources Council sued the State Department and the U.S. Fish and Wildlife Service on Wednesday for violating the National Environmental Policy Act by allegedly allowing construction of the pipeline to begin in Nebraska.

Read the rest of this Huffington Post Green story, here.