A security guard in Vĩnh Long province has been arrested following the death of a colleague after a workplace dispute. The incident occurred during a late-night shift change at a bank branch. A disagreement between the two guards escalated into a physical altercation. The suspect reportedly struck the victim with a chain, resulting in fatal injuries. Authorities are investigating the circumstances surrounding the assault and have taken the perpetrator into custody. The incident highlights concerns about security and potential violence in the workplace. This case is prompting a review of safety protocols for security personnel at financial institutions in the region.