BJP workers, led by Andhra Pradesh unit president K Hari Babu, observed a fast here today to protest the 'stalling' of Parliament by opposition parties.
Those who took part in the fast were BJP floor leader in the Assembly, P Vishnu Kumar Raju and MLC P V Madhav.
Tension prevailed when some CPI workers picked up an argument with BJP leaders over the fast.
This led to a clash between the two sides, police said, adding, about 20 CPI workers were arrested