
The two protesters whose names were not known were among the protesters who tried to enter the Metropolitan Police Bureau.
Police in the Bureau compound threw home-made explosives into the protesters. The impact of the blaze cut off legs of two protesters and injured many others.
They were rushed to Vachira Hospital, their names were not known.
The clash took place as police tried to prevent the protesters from entering the Bureau's compound.
During the 15-minute clash, Border Patrol Police's deputy commander Pol Maj Gen Kosin Boonsang suffered a cut at his head after protesters threw an iron stick at him.
When police fired tear gas at the protesters in front of the Parliament on Tuesday morning, three protesters lost right foot, left leg and right hand respectively.