BANGKOK - Thailand's Constitutional Court on Wednesday dissolved the main opposition Move Forward Party, ruling its efforts to amend a law against defaming the kingdom's royal family violated the constitution.

The judges voted unanimously to order the dissolution of the Move Forward Party and impose a ban on the party's executives from political activity for 10 years.

READ MORE: Thai court to make decision on Move Forward dissolution on August 7

The party's campaign to amend the royal insult law was considered an attempt to undermine the nation's constitutional monarchy, the court said.