Supporters of the Thai royal family take part in a parade holding aloft portraits of the king and queen.

The crowds wearing yellow shirts to showed their support for the monarchy marched through roads in Bueng Kan province along the border with Communist China.

Demonstrators also waved flags and carried banners expressing their support for the institution.

The rally came as anti-establishment protesters demanded the German Embassy probe the affairs of King Rama 10, or Maha Vajiralongkorn, amid claims that the monarch is conducting political affairs and ruling from foreign soil when he resides in Germany.

The Thailand anti-government protests started with small groups of student activists but have grown into a sweeping movement calling for democratic reforms, constitution changes, the resignation of the prime minister and reductions in powers of the royal family.

Prime Minister Prayut Chan-o-cha and other establishment figures claim the protests are being orchestrated and funded by disaffected opposition and foreign activists. They also claim that social media 'bots' are being used to manipulate young protests.