Letters allegedly from the Consulate General of Ukraine in Düsseldorf, calling to join the International Legion of Ukraine for a cash reward have been delivered to German citizens.

The spokesperson of the Ministry of Foreign Affairs of Ukraine, Oleh Nikolenko, has written about this on his Facebook page.

"The letters are fake. The Ukrainian consular institution did not send any letter like that. The consuls have already contacted the German police to conduct an investigation," the message reads.

The Ministry of Foreign Affairs has noted that they consider the fake letters as part of the enemy's disinformation campaign aimed at discrediting Ukrainian diplomacy and undermining support for Ukraine from Germany and its citizens.

As reported, unknown persons e-mailed the Embassy of Ukraine to Moldova about alleged landmines - a police check showed the threats were false.

The Embassy of Ukraine in Bucharest received two suspicious packages on December 6. Deminers were called to the scene. The Embassy of Ukraine to Denmark also received a dangerous package after that.

On December 5, the police in Spain seized new packages from the post office with animal eyes inside addressed to Ukrainian diplomatic institutions for intimidation.

After the terrorist attack in Spain, bloody packages arrived at the embassies to Hungary, the Netherlands, Poland, Croatia, Italy, the consulates general in Naples and Krakow, as well as the consulate in Brno. There were animal eyes inside. There were animal eyes in the packages, and the packages themselves were soaked in a liquid of a typical colour, smelling accordingly.

Later it became known that the embassy of Ukraine in Madrid, where the "letter bomb" was sent on Wednesday, received a package with traces of blood.

The Minister of Foreign Affairs of Ukraine, Dmytro Kuleba, confirmed 31 cases of threats in 15 countries.

Read more Explosion in Embassy That Should Change Spain's Policy on Weapon Supply to Ukraine.