Handing in their papers were Deputy Prime Minister Somkid Jatusripitak, Finance Minister Uttama Savanayana, Energy Minister Sontirat Sontijirawong, Minister of Higher Education, Science, Research and Innovation Suvit Maesincee and Kobsak Pootrakool, deputy secretary-general to the PM for political affairs.
Except Somkid, all of them went personally to Government House to submit their own letters and handed over Somkid's resignation.
Sontirat, Suwit and Uttama had earlier resigned from the Phalang Pracharat Party's executive posts.
Uttama said that it was the right time to step down, insisting that they were not under pressure to resign.
Sontirat said he has no plan to set up a new political party.
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