According to this it was more than several.
Key to the Kirov Murder
This is the html version of the file
http://src-home.slav.hokudai.ac.jp/pdf_seminar/20060317/lenoe.pdf.
>...At some workplaces employees tore down or defaced
portraits of Stalin. Meanwhile Stalin's defenders were at least as
vociferous. In Georgia the republic leaders imposed martial law after
pro-Stalin riots on the anniversary of the dictator's death. Soviet
security forces killed twenty people in the suppression of the riots.