US safety board investigates rail firm Norfolk Southern after Ohio derailment

The National Transportation Safety Board will look into five significant accidents involving the operator since December 2021

Federal investigators announced on Tuesday a special investigation into rail operator Norfolk Southern following a fiery derailment on the Ohio-Pennsylvania border in February and several other accidents, including the death of a train conductor just hours earlier on Tuesday.

The National Transportation Safety Board (NTSB) said it will take a broad look at the railroad's safety culture, saying it has sent teams to look into five significant accidents involving Norfolk Southern since December 2021.