CALCUTTA, India, June 8.-Armed police reservists were called out today to prevent rioting between hungry East Pakistani refugees and angry Indian residents at Barasat, 15 miles north of here.

The trouble started when some of the more than 200,000 refugees who have poured into Barasat-a town of about 90,000-set up camp in schools, public buildings and in a few cases in mosques.

The refugees are predominantly Hindu and, although West Bengal is a largely Hindu state, the Moslems in Barasat reacted violently when their mosques were invaded. The police turned the refugees out of the mosques and private homes, but allowed them to remain in public buildings.

[West Bengal is short of police because so many are guarding the rivers to keep the bodies of cholera victims from being thrown in, AP reported. D. K. Ghosh, district magistrate of Krishnagar, said the rivers are being polluted by corpses disposed of by relatives.]

As international aid poured into India for cholera victims, warnings were sounded in Calcutta that political agitators were trying to incite the estimated 5 million East Pakistani refugees who have entered India.

Indian officials have been nervously expecting Communists and other antigovernment parties to make capital out of the refugee problem, but have been surprised at how little there has been of this so far. Health officials in Calcutta said there was no way of stopping cholera from spreading throughout West Bengal, of which Calcutta is the capital, during the current monsoon months,

"There is no way of stopping it," one official said. "We can't hope to get rid of it. The only thing we can do is try to contain it."

Mass innoculations of refugees in big camps outside the city were being carried out nonstop by medical teams. But conditions in the camps were reported to be getting progressively worse.