New Delhi. -- The Indian Government, growing increasingly concerned about its ability to cope with the mounting flow of East Pakistani refugees fleeing the Pakistan Army, issued a new appeal today for outside help and said the refugees were an international responsibility.

At a news conference here, R. K. Khadilkar, Minister of Labor and Rehabilitation, said the refugees were now pouring in at a rate of 60,000 a day and that the total number had passed 1.5 million.

The official estimated that perhaps as many as five million would eventually cross into India. it would cost the Government possibly about $150 million a year to support them, he said.