# Adamuz train accident investigation > Live situation record from CLSTR: https://clstr.news/situations/adamuz-train-accident-investigation > Updated: 2026-09-07T04:45:25.000Z. Sources: 19. Developments: 3. Investigations into the Adamuz train accident, which resulted in 46 deaths and over 120 injuries, continue to focus on the technical causes of the January 18 derailment. The accident involved an Iryo train derailing into the path of a Renfe Alvia train. A Guardia Civil report has identified a complete transverse fracture in the rail at kilometer point 318+681 as a primary anomaly. This fracture occurred at a weld connecting rail sections from 1989 and 2023. Judicial experts are examining a 6.4-millimeter leveling defect detected at kilometer point 318+682 in October 2025, three months before the crash. Experts suggest this defect may have caused a ‘seesaw’ effect, potentially amplifying material fatigue as train wheels passed over the dip. State-owned rail manager Adif has defended its maintenance protocols, maintaining that the 6.4 mm anomaly was well within European safety and comfort thresholds. Adif officials noted the defect did not require immediate intervention because it remained significantly below the 16 mm threshold for mandatory action, and subsequent dynamic inspections reportedly showed levels within permitted limits. Political tension remains high as investigators seek to determine accountability for the tragedy. ## Claims - The Adamuz train accident resulted in 46 deaths and over 100 injuries. (disputed by 8 sources) - The track breakage occurred at kilometer point 318+681. (disputed by 5 sources) - The train accident in Adamuz resulted in 46 deaths and more than 120 injuries. (disputed by 3 sources) - The leveling defect was detected in October 2025 at kilometer point 318+682. (disputed by 3 sources) - The breakage site involved a weld connecting track sections from 1989 and 2003. (disputed by 2 sources) - The rail fracture occurred at a weld connecting a track section from 1989 with one from 2023. (disputed by 2 sources) - A 6.4 millimeter leveling defect was detected in October 2025. (corroborated by 8 sources) - Minister Óscar Puente dismissed reports of a new Guardia Civil report as a 'hoax'. (corroborated by 4 sources) - The Guardia Civil report identifies a complete transverse fracture in the rail as the first anomaly detected. (corroborated by 3 sources) - Judicial experts suggest the 6.4 mm track defect may have contributed to the rail fracture by amplifying fatigue damage through cyclical vertical impacts. (corroborated by 3 sources) ## Timeline ### 2026-09-07: Adamuz train accident investigation focuses on 6.4mm track defect Investigators are examining a 6.4mm track defect in Adamuz that may have caused a high-speed rail collision, which killed 46 people and injured over 120. 5 sources. https://clstr.news/cluster/adamuz-train-accident-investigation-focuses-on-64mm-track-defect ### 2026-09-03: Adamuz train accident investigation focuses on rail fracture and track defects Investigations into the Adamuz train crash reveal a rail fracture at a weld between 1989 and 2023 tracks. Experts link the failure to a 2025 track defect, while Adif claims all levels were within safety limits. 16 sources. https://clstr.news/cluster/adamuz-train-accident-investigation-focuses-on-faulty-track-welding ### 2026-08-13: Iñaki Barrón cites maintenance issues following Adamuz derailment Former investigator Iñaki Barrón cites maintenance failures in Spain following the Adamuz derailment and notes that lifting railway restrictions depends on Adif's repair speed. 4 sources. https://clstr.news/cluster/iaki-barrn-cites-maintenance-issues-following-adamuz-derailment --- Cite as: Adamuz train accident investigation. CLSTR, https://clstr.news/situations/adamuz-train-accident-investigation