Supporters gathered at a rally for the eight Spaniards who were detained Friday for taking part in the military conflict in Donbas in central Madrid on Sunday evening.
The eight, who are suspected of "violating neutral stance of the Spanish state," told RIA Novosti that the accusations were baseless.
They added that the Spanish authorities persecuted only the supporters of communist and antifascist movements while Spaniards who fought for the Ukrainian armed forces escaped punishment.
"I think that our detainment was aimed at keeping other Spaniards away from Ukraine," Hector Arroyo told RIA Novosti.
According to him, "there are still some Spanish nationals" in the conflict zone. He also told about Spaniards who fought for the Ukraine army. Unlike him, they are mercenaries and receive money for their job.
Sergio said that he arrived at Donetsk in September. He learned from social media that there were recruitment stations in Donetsk and Luhansk. He came to a recruitment station in Donetsk. In the beginning he served in the Vostok battalion, and then moved to Luhansk.
He explained reasons behind his decision to go to Donbas: "I saw people were killed and burned. I could not tolerate such atrocities against civilians."
He also told about Spaniards who fought for the Ukrainian armed forces.
Ramiro Gomez, one of the leaders of the Madrid Committee in Support of Anti-Fascist Ukraine, also said that Spanish nationals fought in the Ukrainian army. He said he travelled to Luhansk on "a humanitarian mission".
He criticized Spanish authorities for planning to adopt a bill on volunteers who come abroad. In September Spanish Foreign Minister Jose Manuel Garcia-Margallo said that authorities prepared a bill which would designate any participants in military operations abroad Spain as terrorists. However, the bill has not become law yet.
"If we carefully read the bill, it becomes clear that raising money and supplying of medications are also designated as support of terrorism," Ramiro said.
Augustin Rios, a representative of the Committee in Support of Anti-Fascist Ukraine, believes that Spanish leftists owe to the countries which supported Republicans during the Spanish Civil War in 1936-1939.
Sergio and Hector are sure that the Minsk agreements will fail. They came to the conflict zone when the first Minsk agreements were reached in September and fighting did not cease.
"I came right after the first Minsk agreements were reached. Before I got to Donetsk, I saw checkpoints were shelled, and one building was completely destroyed," he remembered.
Donbas residents should be given the right to determine their future on their own, Sergio believes.
"They should leave these people alone. They should let Donbas residents decide how they want to live," he said.