Thai agitators vandalised a police car after they converged on different embassies to submit letters criticising the government and calling for international support for their movement.

Activists claimed that their country was undemocratic and complained about the political handling of the Covid-19 pandemic.

The Thailand protest group visited the Swiss embassy, the Embassy of the United States and the outpost of the Communist regime China with similar letters.

Footage from the capital Bangkok shows how the anarchists later vandalised a police car by covering it with stickers and staged a rally – ignoring a law introduced in response to the coronavirus earlier this year which bans gathering of more than five people.

The country has recorded 1,009,710 Covid-19 cases and 8,826 deaths as of August 20 – similar to other countries in Southeast Asia.

However, activist groups whose popular support was waning have used the situation to pressure the government and criticise its vaccine procurement.

Demonstrators are demanding new elections, the prime minister to resign and a new constitution with ‘more democracy’.

Ministers say the unrest is being funded by disaffected opposition, exiled politicians and extremist groups who encourage students to join the protests. They have cited evidence that social media bots are being used to provoke the unrest among the impressionable youth – who could then face years in prison for getting involved with the anti-establishment rallies.

Officials have banned gatherings of more than five people and rolled out a 9pm curfew due to the Covid-19 pandemic but the laws have been ignored by the demonstrators.