The condition of three AIIMS resident doctors, on an indefinite hunger strike to protest against the passage of the OBC reservation bill, deteriorated on Sunday even as five medicos from the Maulana Azad Medical College joined the stir.

Three resident doctors who went on a hunger strike on Thursday night, have been kept under observation, Anil Sharma, spokesman of the AIIMS Resident Doctors Association said.

Five resident doctors of MAMC joined their 25 colleagues from AIIMS on an indefinite hunger strike that began on Thursday night, soon after the passage in Lok Sabha of the Bill providing 27 per cent quotas to OBCs in government-aided educational institutions.

Fifteen resident doctors of AIIMS began the strike on Thursday and five of their colleagues have been joining them every day.

"Condition of threee doctors has begun to deteriorate. Since all of us are doctors we have kept them under observation," Sharma said.

A group of pro-quota doctors, under the banner of Progressive Medicos and Scientists Forum issued a statement condemning the hunger strike which they claimed was 'led by a few upper caste chauvinists, who have their own vested interests'.

The AIIMS administration on Friday banned rallies or demonstrations in the hospital campus.

Health services were affected in May when hundreds of doctors from state-run hospitals in New Delhi went on a 17-day strike to protest the centre's proposal giving job quotas to OBCs.