The passenger train of the České dráhy Os 7406 was travelling on the route Plzeň hlavní nádraží - Domažlice and consisted of a RegioShark diesel unit (844.006-7).

Despite its importance and load, the line from Plzeň to Domažlice is single-track, so opposite coming trains must cross at stations or at passing loops.

The Siemens locomotive pulling the express derailed with three axles on impact and its front end, including the driver's cab, was completely destroyed.

[4] The first report of the crash was received by emergency operators at 8:08 a.m. All components of the Integrated Rescue System immediately rushed to the site.

Minister of Transport Karel Havlíček also arrived at the scene, confirming the three victims and saying that the cause of the accident was probably the express running through the "Stop" signal.

[6] The line remained closed after the accident, with the first train passing the site at 18:30 on 6 August 2021.

[8] The investigation was also launched by the Czech Police on suspicion of committing the crime of general danger due to negligence.