The protesters were led by Luang Poo Buddha-issara.
Confrontation broke out with both sides throwing plastic bottles at each other and one gunshot was heard.
Hundreds of police were called in and formed a line in between the two rival groups.
The redshirts later decided to pull out after being heavily outnumbered but vowed to return to recapture the place with more men.
Their makeshift tents, stage and chairs were then removed by anti government protesters.
The abbot said he has to lead farmers to the Government Lottery Office to ask for the unpaid sum of 200,000 baht for the rice which farmers sold to the office last week.
He had to use the road in front of the NACC which was blocked by the redshirts.
(photo : www.facebook.com/pages/ตรงจากสนามข่าว)