Kaljurand told AP Television News that the protests appeared to be highly organized, rather than spontaneous expressions of anger by Russians.
"I don't want to accuse anyone, but I am sure that these actions are very well organized, financed and orchestrated," she said, noting that youngsters had set up camp outside the embassy for seven days.
Nashi has close ties to the Kremlin, and another group that protested is the youth wing of Russia's dominant pro-Kremlin party, United Russia.
Asked whether the decision to stop the blockade was a directive from Russia's political leadership, Nashi spokeswoman Anastasia Suslova described the notion "nonsense."
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