WASHINGTON, Dec. 4 — A senior State Department official said today that “India bears the major responsibility for the broader hostilities” that have broken out between Pakistan and India.

The official, speaking at a special news briefing at the State Department, said, how ever, that “the beginning of the crisis can fairly be said to be the use of force by Pakistan.

“We believe,” said the official, who refused to be identified, “that since the beginning of the crisis Indian policy, in systematic way, has led to the perpetuation of the crisis, deepening of the crisis, and that India bears the major responsibility for the broader hostilities that have ensued.”

The briefing was called as the United States announced that it had joined in requesting an emergency session of the United Nations Security Council to discuss the India‐Pakistani fighting.

The United States decision, announced by Secretary of State William P. Rogers, followed virtual round‐the‐clock deliberations in Washington. Mr. Rogers said the decision had been made because the “deteriorating” situation posed a threat to international peace and security.

Charles W. Bray 3d, State Department spokesmen, read the announcement and said that the United States hoped that the Security Council could take prompt action on steps to bring about a cease‐fire and withdrawal of forces.

Senator Mike Mansfield of Montana, the Senate majority leader, criticized the Administration's “foot‐dragging.”

“We should have gone to the U.N. two weeks ago,” he said. “It was the only political action possible.”

Mr. Mansfield said President Nixon's friendship with President Agha Mohammad Yahya Khan of Pakistan was a possible explanation for the belated United States recourse to the world organization.

Ronald L. Ziegler, White House spokesman, said this morning in a briefing at Key Biscayne, Fla., where President Nixon is spending the weekend, that Mr. Nixon had been consulting extensively by telephone last night and today on the Indian‐Pakistani situation with Henry A. Kissinger, his national security adviser. Mr. Kissinger is at the White House.

“The President, of course, Is concerned about the deteriorating situation in South Asia,” Mr. Ziegler said. “In the phone conversations yesterday and this morning with Dr. Kissinger he instructed him that this action be taken.”

In what appeared to be a rebuke to India, Mr. Ziegler said: “The U. S. cannot help but look with anything but dis may at the movement of military forces across borders. India has launched an extensive movement of forces into East Pakistan.”

Asked why he appeared to be censuring India and had made no mention of Pakistani bombing raids on Indian tar gets, Mr. Ziegler replied: “The situation in reports coming out of the area is confused. We can refer to the Indian action both by the events and the statements of the Indian Government.”

In ascribing to India the principal blame for the broadening of the crisis, high State Department officials conceded that their efforts at private diplomacy in recent months had not been successful. At the same time they suggested that the Administration, in referring the crisis to the Security Council, would try to pursue in public the same course that it had been following in private.

In asserting that the United States had not received “minimal” cooperation from India, United States officials said that India had given direct support to Bengali guerrillas in crossing the Indian‐East Pakistani border, had provided a substantial training program for guerrillas and had repeatedly blocked United Nations efforts to send observers to the border.

They said that India had re fused the good offices of Secretary General Thant of the United Nations and had also refused United States requests that India urge the guerrillas not to attack United Nations ships and trucks carrying relief supplies.

The United States tried to Induce both India and Pakistan to accept a withdrawal of their military forces, the officials said, but India demurred. During and since Prime Minister Indira Gandhi's recent visit here, they said, President Nixon and other officials informed her that the Pakistan Government would withdraw its forces if it could be assured that India also would. But India declined, they said.

The officials declined to say whether the United States would cut off economic aid— running at $225‐million yearly —to India but indicated that the question was under review.