Bangkok, Thailand (CNN) A Thai political party that nominated a princess as its candidate in upcoming elections has been dissolved by the country's Constitutional Court, in what could prove to be a blow for the pro-democracy movement.

The court ruled Thursday that by nominating Princess Ubolratana Rajakanya, the elder sister of King Maha Vajiralongkorn, Thai Raksa Chart Party (Thai Save The Nation, or TSN) was deemed "hostile to the monarchy institution."

The party's executive members will be banned from politics for 10 years, the judge said.

TSN intended to contest 174 of 375 constituencies around the country -- those candidates will no longer run as the deadline to register with another party has long passed.

Ahead of the ruling, about 1,200 police officers were deployed around the court in Bangkok, to control expected crowds in a case that has stirred widespread national attention.

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