UNITED NATIONS, N. Y., May 12 — President Agha Mohammad Yahya Khan has told Secretary General Thant that United Nations emergency help for East Pakistan is not needed now but he left open the possibility of accepting international aid in the future.

In a letter, the President also complained that news accounts of widespread casualties and destruction in East Pakistan were “highly exaggerated—if not not altogether tendentious.”

Meanwhile, India charged that military forces from West Pakistan had carried out “wild destruction of life and property” in a drive to crush the East Pakistani movement. Pakistan in turn accused India of encouraging and aiding the separatists in hopes of breaking up Pakistan.

President Yahya's response to Mr. Thant's April 22 offer of humanitarian assistance was not regarded here as a refusal of all help In the future and United Nations authorities said that Mr. Thant was continuing to explore the possibilities of assistance.

The Pakistani President told Mr. Thant that there were adequate supplies of medicines and food in East Pakistan, that authorities there saw “no cause for concern” and that rehabilitation and reconstruction were moving ahead.

As for international help,” if and when required, “it will be administered by Pakistan's own relief agencies,” the President said.

During the debate in the Economic and Social Council's Social Committee, touched off by India's charges, Mrs. Rita Hauser of the United States expressed hope that Pakistan would agree to make “early and full use” of the Secretary General's offer.

She said the United States and other governments were consulting Pakistan on the form of help. She added that Washington had allocated $2.5‐mil lion to help East Pakistani refugees in India.