A preliminary report released last week included detail about the fuel, saying that the fuel to the plane's engines appeared to have been shut off.

The U.S. assessment is not contained in a formal document, said a source, who emphasized the cause of the deadly crash remains under investigation.

NEW DELHI — A cockpit voice recording from the June 12 crash of an Air India Boeing 787 indicates that one of the pilots may have cut off fuel to the plane’s engines just after takeoff, according to a report by The Wall Street Journal, citing people familiar with the early findings of U.S. investigators.