What caused the British oil spill? I want to write a composition, urgent!

It was a broken screw that caused the explosion. Ed Markey, the Democratic leader of the Energy and Environment Committee of the US House of Representatives, distributed the document. In a statement, he said: "The BP document raises a puzzling question. How much did BP know and when did it know? Obviously, when the incident just happened, BP did not tell the truth to the US government and people about the oil spill. " Markey, who criticized BP's handling of the oil spill, said in an interview with NBC on the 20th: "They initially said that only 1000 barrels of oil leaked, and later said that there were 5,000 barrels, and now the figure has risen to 654.38+10,000 barrels. At the beginning of the incident, BP either lied to reduce its responsibility or was' very incompetent' and failed to make a' comprehensive response' to this disaster. "