A Czech proton therapy centre says it is ready to treat Ashya King within the next few days.
The statement, issued on behalf of the Proton Therapy Center Czech, said:
The center is ready to accept Ashya King immediately if the specialists receive proper medical documentation from the UK doctors.
If Ashya is indicated for proton therapy, the center is keen on starting the treatment in a few days. The costs would be dealt with later on.
A further statement added that the eventual cost of the treatment could be about a third of the cost in the US.
"European patients should have the right to access the treatment under the S2 rules or cross border health care act and have the treatment reimbursed," the centre's marketing manager said.
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.
The parents of Ashya King said they took him out of a hospital to seek proton beam treatment which is not available under the NHS.