"Spanish police seized three envelopes with what are believed to be animal eyes at the post office, which were addressed to the Ukrainian embassy in Madrid, the consulate general in Barcelona and the consulate in Malaga. Investigations have begun," Nikolenko wrote on social media.
Last week, Ukrainian diplomatic missions across Europe received blood-stained packages with animal eyes in them.
Following the incident, Kuleba instructed his ministry to immediately strengthen the security of all Ukrainian embassies overseas.