BP Says "Multiple Companies" Responsible for Gulf Oil Disaster
"It is evident that a series of complex events, rather than a single mistake or failure, led to the tragedy," outgoing CEO Tony Hayward said in a statement. "Multiple parties, including BP, Halliburton and Transocean, were involved."
The report is the conclusion of a four-month investigation carried out by Mark Bly, BP's safety and operations chief.
"Based on the report, it would appear unlikely that the well design contributed to the incident, as the investigation found that the hydrocarbons flowed up the production casing through the bottom of the well," Hayward said.