DALLAS (CBSDFW.COM) – A railroad worker died after he was pinned underneath a train’s rail car wheel in South Dallas.

It happened as the train was maneuvering into a rail yard near Cockrell and Corinth streets. During the movement, one of the crew members sustained fatal injuries.

“Our thoughts are with the family and friends of this fellow railroader,” said Union Pacific Railroad spokesperson, Jeff DeGraff.

The rail yard is operated by the Dallas, Garland & Northeastern Railroad (DGNO), and the crew members were also from DGNO.

Police and National Transportation Safety Board officers responded to the call early Monday morning to the 600 block of Corinth Street.

The NTSB tweeted that they sent a team of three investigators to Dallas for a Northeast Railroad accident in which an employee died.

A witness told them he was in contact with the victim by radio all night while they worked.

When the victim stopped responding, the witness went to his work station and found the man pinned underneath the rail car wheel.

The witness immediately called 911 for help.

Dallas-Fire Rescue pronounced the employee dead at the scene.

The victim’s cause of death is unexplained at this time.