Protesters pass round a giant green inflatable alien at protests tonight (November 25) in Bangkok, Thailand.

Thousands of police officers and riot teams were deployed at several locations amid fears of unrest. Protests last week escalated into violence with water cannons mixed with tear gas being fired at the assembled crowds.

Thousands of anti-establishment protests have taken place in recent months across Thailand.

Activists are calling for sweeping reforms including a new constitution, the resignation of the prime minister Prayuth Chan-o-cha and reforms of the monarchy.

Thai government ministers claim the protests are being funded and encouraged by disaffected opposition and international groups to destabilise the country.