Missing mother Jennifer Jones, who disappeared with her four children, has been found safe and well in the Gwent area of Wales, Dyfed-Powys police said.
It comes after High Court judge asked for public help finding four children "abducted" by their mother following a care dispute.
Mr Justice Roderic Wood said he was "very concerned" for Jessica, Tomas, Eva and David Palacin Jones.
(From left) Eva, Tomas, Jessica, David and Sarah (who is not missing) Palacin Jones in a family holiday photo
He said the "vulnerable" youngsters - aged between 14 and eight - had gone missing from their mother Jennifer Jones' house in Llanelli, Carmarthenshire, and "must be found".
The children had been in the care of their Spanish father Tomas Palacin Cambra, 52, who lives in Majorca, said the judge.
Ms Jones, 46, who teaches English as a second language, had "abducted" the children then "defied" a High Court order to return them to her divorced husband, he added.
Mr Justice Roderic Wood said he had ordered the children's "immediate removal" from their mother at a High Court hearing on Monday.