Missing five-year-old Ashya King and his family have been found in Spain, Hampshire Police have said.
Spanish police are now questioning the boy's parents, for whom a European arrest warrant had been issued.
Ashya, who has a brain tumour, had been taken out of Southampton General Hospital by his mother and father against medical advice.
Police in Hampshire could not confirm what condition the boy was in nor where in Spain the family was found.
Earlier, officers said they thought his family had "taken steps to be able to feed him".
It was feared the battery on Ashya's medical feeding unit, which was designed only for temporary use and was not easy to replace, had run out.
Police had said it was unclear whether Ashya's parents, Brett and Naghemeh King, had spare batteries.
Hampshire Assistant Chief Constable Chris Shead had said without properly administered food, Ashya's situation was "very serious".
The five-year-old and his family, who are Jehovah's Witnesses, boarded a ferry to France on Thursday.
The arrest warrant was "based around neglect", said Mr Shead. But he stressed it did not necessarily mean Ashya's parents would be charged with that offence.