In a statement on Wednesday, the Constitutional Court said it would hear a case against Prime Minister Srettha Thavisin on June 18. It stems from a complaint by 40 military appointed senators in May, who alleged that he breached the constitution by making a cabinet appointment.

The court also said it would hold a hearing next Tuesday in a case brought by the country’s election commission that is seeking to disband the opposition Move Forward Party.

The party was the surprise winner of last year’s general election, but failed to form a government after it was blocked by the conservative-royalist establishment.

Meanwhile, influential former premier Thaksin Shinawatra – who returned to Thailand last August after 15 years of self-imposed exile is scheduled to be formally indicted in a criminal court for lese majeste and computer crime on Tuesday.

The court cases have ramped up political uncertainty in Southeast Asia’s second-largest economy and roiled its markets.

Srettha, Thaksin and the Move Forward Party deny any wrongdoing.