Articles written by Greg Bluestein Matt Brown Associated Press Writers Covington

GREG BLUESTEIN MATT BROWN Associated Press Writers COVINGTON, La.

Oil giant BP is focused on two key areas around the blown wellhead as it probes the cause of the unchecked Gulf of Mexico oil spill, the company said as it started to brief federal authorities on its internal investigation. BP PLC said in a release late Monday that it has not reached a final conclusion. But it said multiple control mechanisms should have prevented the accident that started with an oil rig explosion April 20 off the coast of Louisiana. The largest oil and gas producer in the Gulf listed seven mechanisms where...