28 men of the Red Guards or civilians thought to have been affiliated with them executed by the German Baltic Sea Division soldiers are buried at the site.

When the locals had fetched from the pile of bodies their family members, the rest, people from out of town, were transported to a pit in an uninhabited location near-by.

Another version has it that the executions were a reprisal for the German commander, General Rüdiger von der Goltz’s car having been shot at.

[1][2][3][5] According to a traditional view, Estonian Deputy Prime Minister Jüri Vilms and his companions Arnold Jürgens and Johannes Peistik as well as their guide Aleksei Rünk, executed on 12 or 13 April on the grounds of the Töölö Sugar Factory, had also been buried in the same mass grave.

Estonian investigators exhumed in December 1920 four bodies that they identified as Vilms, Jürgens, Peistik, and Rünk on the basis of their clothes, and they were reburied in Estonia.

Finnish historian Seppo Zetterberg has later come to the conclusion that the story of Vilms’ execution in Helsinki and burial in the Haaga mass grave is unreliable and possibly made up.