The incident occurred on the BI-625 road, heading towards Bilbao, near the municipality of Arrigorriaga, at approximately 5:00 PM on May 2. For reasons yet unknown, a bus and a car collided, leading to the road's closure.

All three individuals who required medical attention, who were occupants of the car, were transported by ambulance to Cruces hospital. The driver of the involved bus, which was carrying no passengers, was unharmed, as reported by the Security Department of the Basque Government.

Due to the accident, the road remained closed for about two hours, with traffic being rerouted through the AP-68, causing significant disruption to local traffic flow.