A complete work stoppage has occurred on all six lines of the Buenos Aires subway system following the arrest of three union representatives during a protest. Union officials have declared a “state of alert” in response to the detentions. The protest centers around the outsourcing of maintenance tasks, a practice the union strongly opposes. The arrests have triggered an immediate and total shutdown of subway service across the city of Buenos Aires, impacting commuters throughout the metropolitan area. Further negotiations are expected, but a resolution remains uncertain as the union demands the release of those detained and a halt to the contested outsourcing practices. The situation is causing significant disruption to public transport in Buenos Aires.