CALCUTTA, India, Nov. 27— While fighting goes on inside East Pakistan between the Pakistan Army and the Indian‐supported Bengali insurgents, rumors of dramatic things about to happen fly about this city, where the insurgent government has its headquarters.

The atmosphere of expectancy has been enhanced by the shroud of secrecy that has descended on official circles. Key sources have turned tight lipped, offering only suggestions to “wait a few days.”

What has most fueled this atmosphere is that the Cabinet of the insurgent Bangla Desh (Bengal Nation) government has dropped out of sight— “gone underground,” as Bangla Desh sources put it.

Unconfirmed but widely believed reports indicate that the Cabinet flew to New Delhi on Tuesday in a special plane to confer with the Indian Government.

One rumor is that Prime Minister Indira Gandhi called them to the capital to tell them that she is going to grant formal recognition to the Bangla Desh government, sign a defense treaty with it and then provide it with full military support to oust the Pakistani army from East Pakistan.

Another rumor is that President Nixon has sent special representatives to both Islamabad and New Delhi in a last‐minute effort to prevent another India Pakistan war.

Kissinger Trip Recalled

American diplomats here say they know nothing of such a move, but recalling Henry A. Kissinger's secret visit to Peking for Mr. Nixon, no one is inclined to discount the possibility.

It is considered quite possible that Mrs. Gandhi called the Bangla Desh cabinet to New Delhi simply to inform them of her plans, which may not include immediate diplomatic recognition.

Mrs. Gandhi is coming to Calcutta on Dec. 4 to make a speech, the nature of which is unknown, on the parade ground in the heart of the city.

Some observers expect a dramatic announcement, but the others note that Mrs. Gandhi does not usually announce major decisions in public speeches.