The Nationwide Transportation Security Board on Tuesday mentioned it opened a particular investigation into Norfolk Southern after latest derailments.

The particular probe will look into the corporate’s group and security tradition, based on a press launch.

“Given the quantity and significance of latest Norfolk Southern accidents, the NTSB additionally urges the corporate to take rapid motion in the present day to evaluate and assess its security practices, with the enter of workers and others, and implement crucial modifications to enhance security,” the NTSB mentioned in an announcement.

Norfolk Southern CEO Alan Shaw mentioned the corporate will absolutely cooperate with the NTSB.

“Shifting ahead, we’re going to rebuild our security tradition from the bottom up. We’re going to make investments extra in security,” he mentioned in an announcement Tuesday. “This isn’t who we’re, it isn’t acceptable, and it’ll not proceed.”    

The information of the probe comes earlier than Shaw is about to testify Thursday earlier than the U.S. Senate Committee on Surroundings and Public Works to handle potential threats to public well being and the surroundings ensuing from the East Palestine, Ohio, derailment final month.

Committee Chairman Sen. Tom Carper, D-Del., mentioned the panel desires to find out about a wide range of points stemming from that derailment.

“What did they do nicely? What did they do badly? What are they doing to handle issues that they botched? What are they doing because the incident occurred as a way to make individuals really feel cared for, cared about?” Carper instructed CNBC. “Once we stroll out of there, I need to make it possible for Norfolk Southern is doing what they should do to make this proper. Not simply with respect to the parents locally but in addition by way of the motion of those hazardous substances throughout our nation, whilst we converse.”

The NTSB launched a preliminary report final month that pointed to an overheated wheel bearing as an element within the derailment and fireplace.

On Saturday, one other Norfolk Southern prepare derailed close to Springfield, Ohio. Not like the East Palestine incident, this prepare wasn’t carrying hazardous supplies. No accidents have been reported following the derailment.

The NTSB has launched investigations into 5 incidents involving Norfolk Southern, together with the demise of a Norfolk Southern conductor Tuesday morning in Cleveland after a dump truck collided with a prepare at a metal facility. The conductor, who was recognized as Louis Shuster, was struck when a dump truck carrying limestone collided with the aspect of the prepare’s first automobile, a Cleveland Police spokesperson mentioned.

–CNBC’s Christina Wilkie contributed to this report from Washington.