( CNN ) -- Residents in Mayflower , Arkansas , have filed a class-action lawsuit against ExxonMobil after a pipeline rupture that allowed thousands of barrels of heavy crude oil to flow into a residential area . They are seeking more than $ 5 million in damages . `` This Arkansas class action lawsuit involves the worst crude oil and tar sands spill in Arkansas history , '' read the lawsuit , which was filed Friday in U.S. District Court , Eastern District of Arkansas . Exxon Mobil promises to cover oil spill cleanup costs . According to the lawsuit , more than 19,000 barrels were spilled . ExxonMobil has said that between 3,500 and 5,000 barrels of heavy crude leaked from the ruptured pipeline . It has promised to cover cleanup costs . Arkansas Attorney General Dustin McDaniel opened an investigation into what caused a 2- or 3-inch gash in the underground Pegasus pipeline , which began spewing crude on March 29 . The pipeline carries Canadian crude from Illinois to Texas . Opinion : Maybe this oil spill will stick . CNN 's Joe Sutton contributed to this report .
Residents file a class-action lawsuit , seeking more than $ 5 million in damages . ExxonMobil has promised to cover oil spill cleanup costs . A pipeline rupture allowed thousands of barrels of crude oil to flow into a residential area .