BANGKOK (AP) — Thailand’s foreign minister abruptly resigned in dissatisfaction over a Cabinet reshuffle that removed him as one of the country’s deputy prime ministers.

Prime Minister Srettha Thavisin on Monday confirmed the report of the resignation of Parnpree Bahiddha-Nugara, saying that he respected the decision, and that he has already started looking for a replacement.

Srettha said it was normal that some people would be upset by the reshuffle, adding that he already sent a message to Parnpree, apologizing and thanking him for his work.

“For his work that has been in the good interest of the country, I believe that the new minister will continue these good efforts,” he said, but did not say when the next appointee would take up the post.

On Sunday, Srettha’s government, which took office less than a year ago, announced its first Cabinet shuffle. Shortly afterwards, the media circulated a document said to be a letter of resignation from Parnpree, dated Sunday, indicating his dissatisfaction that he was removed from the position of deputy prime minister and only remained foreign minister.