According to a preliminary analysis, these logs were originally loaded onto a truck.
Somehow, a force had hurled the truck along with the logs, and eventually, the logs penetrated the truck because of this force.
In short,
we know nothing.
However...
The government department handling this event had some prior knowledge;
compared to the local police,
they immediately clarified the investigation's direction toward a stranger in a small town upon knowing that a mysterious Superhuman might have come to Siberia.
Therefore,
although there was no surveillance video evidence, the government department quickly learned of the stranger, Chen Yun, through interrogation.
The head of the special department knew of Chen Yun's existence and was aware of his extraordinary abilities.
Previously, the higher-ups had decided to regard Chen Yun as the "Earth Supreme Emperor," so they opted for a low-profile approach to such incidents.