National Transportation Safety Board chairwoman Jennifer Homendy said at a press conference Monday evening that she expects information from the flight recorders to be shared Tuesday.

Homendy, speaking at LaGuardia Airport, said about 25 specialists were expected to be on site, in addition to personnel at the NTSB headquarters in Washington, D.C. The first team members began to arrive at 3:10 a.m. Monday, she said. Canadian aviation officials are en route.

Homendy said there is a “tremendous amount of debris” in the vicinity of the crash site, as well as hazardous material. To get to the flight data reporter and voice recorder, a hole had to be created in the plane roof.

She said the NTSB team will look into the plane operator, components of the plane itself and the wreckage. There will be an air traffic control investigative group and another looking at airport operations, she said. The NTSB will also review surveillance video, she said.

She declined to provide specifics about staffing at the air traffic control tower or whether a flight attendant was ejected from the plane, as has been reported by other media outlets.

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