An organization calling itself Revolutionary Class-Related Self-Defense assumed responsibility for the bomb that exploded outside the offices of Hellenic Train on Friday night, in a posting on a well-known antiestablishment web page.

The same organization assumed responsibility for the bomb placed across from the Labor Ministry in 2024.

In its post, it claimed that its attack on Hellenic Train was a response to the fatal Tempi train collision and "the effort to cover it up", noting that "the coverup of the Tempi crime is the assumption by the government of its political responsibility."

It also said that it dedicates its two bombings mentioned to "the Palestinian people and their heroic resistance."