After a letter bomb exploded in the Ukrainian embassy in Madrid on Wednesday, leaving one person slightly injured, the Spanish government also announced that it had received a dangerous shipment.

A letter bomb addressed to Prime Minister Pedro Sánchez was received on November 24 and rendered harmless, the interior ministry said. In addition, three other similar programs were intercepted by other recipients.

First of all, late on Wednesday evening, a letter bomb was received by the weapons manufacturer Instalaza in Zaragoza and was rendered harmless by the police, State Secretary for Security Rafael Pérez said at a press conference in Madrid. The company produces weapons of war that Spain supplied to Ukraine.

Another suspicious shipment was intercepted early Thursday morning at the Torrejón air force base near Madrid. From there, military planes take off with supplies for the Ukraine. This package is currently being investigated by the police. "The scanner showed that there was a suspicious mechanism in it," said a spokeswoman for the Ministry of Defense of the German Press Agency.

Also on Thursday morning, the Defense Department received a fifth letter bomb addressed to Secretary of Defense Margarita Robles, Pérez said. This shipment was also neutralized.

According to media reports, the Spanish authorities did not rule out that all five broadcasts could be related to Spain's support for Ukraine in the fight against Russia's war of aggression. The investigations are based on terrorist attacks. Ukrainian Ambassador Serhiy Pohoreltsev suspected Russia was behind the attack on the embassy.