It is highly likely that the fugitive former prime minister fled Thailand via the border in the Eastern province of Sa Kaew, he added.

However, Thaweep did not spell out which channel Yingluck used or exactly how she fled from the Kingdom.

He said Deputy Prime Minister and Defence Minister General Prawit Wongsuwan might provide a press briefing to update information on Yingluck’s escape, but it was not yet certain when that would be.

“We have to find concrete evidence before presenting anything,” he added.

Yingluck disappeared shortly before the verdict in the case against her regarding her government’s rice-pledging scheme was due to be read on August 25.

CCTV records obtained by the authorities suggest that she escaped from Thailand in a car crossing from Sa Kaew into neighbouring Cambodia.

The verdict in her case – in which it is alleged that her negligence led to multi-billion-baht damages caused by the rice-pledging scheme – is set to be read on September 27, whether or not she is present in court.

While some political observers have suggested that Yingluck might make a move again at that time, Thaweep said the authorities had no confirmed reports to indicate that.