Question: Kropotkin essay

I'm editing an essay by Kropotkin, "Anarchist Morality", in which the following passage occurs:

"'They have the right to steal,' in speaking of those terrorists who lived on dry bread, and stole a million or two of the Kishineff treasure, taking, at their own peril, all possible precautions to free the sentinel, who guarded the wealth with fixed bayonet, from all responsibility.

I have been unable to find any reference to this incident, which probably occurred in the timeframe 1890 - 1905. Kishineff presumably refers to the principal city of Moldavia, but I 'm not certain about this either. Kropotkin does not indicate whether the "terrorists" were anarchists are belonged to some other faction. Hoping someone can nail down this event.