A Thai court has ordered the dissolution of an opposition party for nominating the king's sister as its candidate for prime minister in an upcoming election.

Election officials in Thailand are threatening to dissolve a party that chose Princess Ubolratana, the king's sister, to run for prime minister.

The sister of Thailand's king entered the race to become prime minister on Friday as the candidate of a populist party, an unprecedented foray into politics by a royal that instantly upended the first election since a 2014 military coup.