Earlier, the demonstrators appeared to be trying to move past barricades to get closer to the Thai parliament by lawmakers are debating proposed amendments of the constitution after months of anti government protests.

While the proposals could make Thailand's King Mawr accountable under Thai law and also reform the Senate whose members are unelected, the BBC's Jonathan Head has bean on the front line with the protesters.

What it looks like the police about so far their water can again.

They've been using them several times on this barricade.

There's another one on the other side of parliament.

But if somewhere behind this you can smell the chemicals that are in the water like tear gas, it hasn't pushed these protesters back.

But look what they're up against this concrete barricade now they're frustrated because in Parliament they're supposed to be discussing the proposals for reform that these protesters have been pushing for for months.

But these young activists are worried that actually in parliament.

They're going to dismiss most of their demands, in particular one for reform of the monarchy.

So they want to stay here.

They're refusing to move.

The police keep giving their warnings.

And I imagine we will see more water cannon if they don't move back.

We've got people trying to climb over the barrier.

Okay, well, these protesters are now trying to pull away at this concrete barricades to make a way through on They are spraying water cannon.

It's laced with chemicals so you can really smell the tear gas in it.

They've been using this throughout today, trying to get people out of the way.

These protesters want to get through the parliament because that's where reforms they're demanding are supposed to be discussed.

For these, this police barricade is pretty formidable.

They're worried that in Parliament dominated by the military backed party, their reforms, they're just gonna be swept aside.

That's why they're staying put on.

You can see how determined they are.

This'll is a rials shower of water laced with chemicals.

It's really not less.