Human error. There was a train stopped in the railway (maybe because it had an issue, still to be cleared). The system knew of this, so it put a red light which was being respected by the other trains to avoid a crash.

The second train, was waiting in a red light but at a certain moment, a human operator told the train driver to ignore the red light and move. The train driver then started the train despite the red light and this is the end result.

Apparently not. The line is equipped with the German LZB system and a similar accident got very close to happening in Germany for reasons that had nothing to do with cost cutting.

Tagging @nomad@infosec.pub as well.

The usual suspect would be lax security measures due to corruption.

Or another russian-israeli crime to hurt the government

I can't imagine how violent that must've been. Such heavy objects colliding, causing thirty people (so far) to lose their lives in the event. 🥺

They are sayin 50 now!

yeah I wouldn't put it past the fsb one bit to create this chaos

At least the causes were very different. The Adamuz accident took place because of a rail breaking. And it broke in a way that would be difficult to cause using explosives or tools, but rather simply because of not having been checked often enough.

This one was the LZB train protection system's computers crashing, which caused 8 trains to be stopped by the protection system. The train dispatcher then did not follow the procedure for ordering the trains to return running: They were supposed to drive their first couple of kilometres with a reduced speed, but they were ordered to proceed at full speed. 7 did, 1 stayed still. And then one of the seven moving trains collided at a very high speed with the one that was standing. The LZB computers crashing is apparently a relatively common occurrence, and happens in the home country of the LZB system, Germany, as well. It could have been a "foreign entity" (heh, guess which one), but actually there's good reason to believe it was a "regular" software mishap. However, what is sure is that the resulting disaster took place because of dispatcher error, and that cannot have been because of any foreign influence.

Low, but not zero. Failures happen, and disaster news gets clicks, so it gets reported on more widely.