It was drawn up by Thailand's former Gionta and protesters want amendments.

They also want the removal of Prime Minister Prayuth Chan Ocha Ah former army ruler, on reforms to curb the powers of the monarchy.

Police set up the barricades on banned protests within 50 m of the area.

They also used tear gas on pro democracy protesters who responded by throwing colored smoke bombs at UM several people were injured.

Lawmakers inside parliament were discussing several proposals for amending the constitution, some of which left the king's powers untouched.

Protests which picked up in July initially targeted private on constitutional change.

But they've since evolved to add calls for the monarchs role to be more accountable on for Thailand to scrap changes that gave the current king personal control of the royal fortune Andi some army units.

Thea position represents a dramatic change in a country where just months ago any criticism of the monarchy was taboo since the institution must be revered under the constitution.

Hundreds of royalists earlier gathered to call on lawmakers not to change the constitution.

They suspect the anti government protesters want to abolish the monarchy altogether, which they deny.