According to information from the Ho Chi Minh City Power Corporation (EVNHCMC), this was a force majeure incident at the Thu Duc 220kV Substation (which supplies a portion of electricity to Ho Chi Minh City and is managed by Power Transmission Company 4), leading to a disruption in electricity supply to the Thu Duc area and the operation of Metro Line 1 (Ben Thanh - Suoi Tien line).
The power outage affected the schedules of 14 trains that were operating at the time.