The bridge connected the municipalities of Aguiarnópolis (Tocantins) and Estreito (Maranhão) as part of the BR-226 highway. The central span of the 533-meter reinforced concrete bridge gave way around 2:50 p.m. of the said date. At least eight vehicles—including four trucks, two cars, and two motorcycles—plunged into the river, which reaches depths of up to 50 meters at that location.