LOUISVILLE, Ky. (AP) — A UPS cargo plane’s left wing caught fire and an engine fell off just before it crashed and exploded after takeoff in Kentucky, a federal official said Wednesday, offering the first investigative details about a disaster that killed at least 12 people, including a child.

First responders, meanwhile, searched for more victims, a day after the crash at UPS Worldport, the company’s global aviation hub in Louisville, though Gov. Andy Beshear said finding survivors seemed unlikely. The inferno consumed the enormous aircraft and spread to nearby businesses.

After being cleared for takeoff, a large fire developed in the left wing, said Todd Inman, a member of the National Transportation Safety Board, which is leading the investigation.

The plane gained enough altitude to

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