Published: May 25, 2010 8:56 PM EDT
Updated: May 25, 2010 5:56 PM EDT

NEW ORLEANS (AP) - Two groups say they'll sue BP PLC for killing endangered species in the Gulf of Mexico by failing to stop the oil spill and by using dispersants under water and on the surface.

The Southern Environmental Law Center and Defenders of Wildlife on Tuesday sent BP a required 60-day notice that they plan to sue under the Endangered Species Act.

Attorney Catherine Wannamaker says they want to make sure that BP is held accountable for all the losses that may occur, and for restoring endangered species.

At least three environmental lawsuits have been filed under the National Environmental Policy Act, which doesn't require prior notice.