The US Attorney General Eric Holder has said that authorities negotiated with BP to resolve the civil claims it is facing but was unable to reach a "satisfactory" number.
He added that is was possible that the US and the oil giant could still resolve the claims out of court, but that officials are preparing for trial.
More top news
Influential black figures have joined forces to speak out about a deadly disease that sees black men twice at risk compared to white men.
Frances Cappuccini died just hours after giving birth after a string of hospital "failures" including "inadequate diagnosis and treatment".
Sinn Fein will not be re-nominating a deputy first minister following Martin McGuinness's resignation, making an election highly likely.