The brother of Ashya King, the five-year-old boy with brain cancer, has released a YouTube video where he thanked David Cameron and Nick Clegg for getting involved in the case but insisted "the fight is not over".
Naveed King also thanked everyone who is trying to reunite Ashya with his parents.
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.