Reuters: BP Plc’s internal probe of the deadly April 20 blowout that unleashed the massive Gulf of Mexico oil spill will assign blame to BP as well as other companies involved in the well’s operations, The Wall Street Journal reported on Tuesday. The BP probe, which will be released on Wednesday, is one of many launched after the blowout led to an explosion aboard the Deepwater Horizon drilling rig that killed 11 men and caused the worst offshore oil spill in history. The Journal said …