(CNN) A cargo jetliner that crashed Saturday in Texas with three people aboard went into shallow water nose first, Chambers County Sheriff Brian Hawthorne said.

He said some human remains have been recovered but didn't specify whether three bodies had been found.

Hawthorne said the crash site in Trinity Bay near Anahuac, Texas, is in water just 5 feet deep and is reachable by airboats and other flat-bottom craft. The scene extends over 3 miles, he said.

Multiple dive teams from the Texas Department of Public Safety, Houston Police, and the Baytown Police are at the crash site, he added.

The sheriff described seeing the contents of packages and cardboard boxes as he traveled across the water, then seeing parts of the twin-engine Boeing 767. The flight was operated by Atlas Air Inc.

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