Ashya King's parents said they wanted the "best treatment" for their son as they were taken by police from the court in Velez-Malaga to a police car this evening.
Brett King could be seen saying: "We just want the best for Ashya." His wife Naghemeh can be heard saying that the couple want the "best treatment" for their son.
Both appeared to be handcuffed and police pushed them into the car.
Ashya King's parents told the Daily Mail they fled the UK after being told NHS treatments would leave him with life-long disabilities.
The head of the police force which applied for a European Arrest warrant against the parents of Ashya King has now urged their release.
A British mother whose son's life was saved by proton therapy has told ITV that she defied NHS doctors' advice to pursue the treatment.