Prayut added that he has no further information on the photographs or her whereabouts.
Yingluck vanished from Thailand last August before she was expected to hear the final verdict in a case stemming from her government’s rice-pledging scheme
The verdict was postponed for a month, when she was sentenced to five years imprisonment.
Various sources have pointed to the UK is a likely refuge for Yingluck, given that her brother, Thaksin Shinawatra, owns a residence and several businesses there.
Last week, local media released two photos of a woman shopping in London and Oxford. While the woman’s features are not clearly seen, she appeared to resemble Yingluck.
A day later, Facebook page @secret100million posted a photo showing a woman who looks like Yingluck and a boy, who resembles her 15-year-old son Supasek Amornchat, in a shopping mall in London.
Thaksin and his children spent their New Year holidays in Japan. They have not commented on the photos.