(CNN) — A team of investigators arrived in Louisville, Kentucky, Wednesday to look into what led to the fiery crash of a UPS cargo plane shortly after it took off from the Louisville airport Tuesday, killing at least 12 people and destroying businesses and other structures in the area.

Officials have warned the death count may rise as the investigation continues.

More than two dozen officials with the National Transportation and Safety Board traveled to the mangled remnants at the crash site near Louisville Muhammad Ali International Airport Wednesday, where they recovered the plane’s black boxes , which could hold crucial information about what led to the disaster.

“It’s suffered some heat, not intrusion, but heat around it. These recorders are built for that,” NTSB Member Tod

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