One of the three Spanish freelance journalists released after nearly 10 months of captivity in Syria says he feels like he is "walking on air" after being reunited with his family in Spain.

Angel Sastre told Onda Cero radio station Monday he is grateful for the government's efforts to secure the men's release but gave no details about how they came home.

The three went missing on July 12 near the city of Aleppo in northern Syria.

Also Monday, acting Foreign Minister Jose Manuel Garcia-Margallo told Antena 3 radio it was "a big relief" when officials discovered that the men were taken by the Nusra Front, al-Qaida's branch in Syria, and not the Islamic State group which commonly kills captives.

Garcia-Margallo also thanked Turkey and Qatar for their help.