NEW DELHI, Monday, Dec. 6 — India today recognized the East Pakistan rebel movement as the government of that area as Indian troops continued to advance into the eastern province of Pakistan.

By yesterday—the third day, of war on the Indian sub‐continent — the Indians reported that they had destroyed all but four of the Pakistan jet fighters in the east and had achieved almost total air superiority there. This would be a critically important military factor.

The Indian Navy reported the first sizable engagement in its history. It said it had sunk two of Pakistan's five destroyers and a merchant ship in an action off Karachi. The Navy said it also attacked a Pakistani submarine in the Bay of Bengal and that large oil slicks indicated that it had been sunk.

Cheers in Lower House

The Lok Sabha, or lower house of Parliament, burst into tumultuous cheers this morning when Prime Minister Indira Gandhi announced that India has recognized the government of Bangla Desh (Bengal Nation) and given it good wishes.

The announcement made clear that India's Main war aim is to sever East Pakistan permanently from West Pakistan.

The Bangla Desh government consists for practical purposes of East Pakistani politicians who escaped to India after the Pakistani military government, which is dominated by West Pakistanis, began to use force last March to crush a growing autonomy movement in the east;

Attack in West Expected

The most prominent East Pakistani leader, Sheik Mujibur Rahman, whose Awami League party won a majority of seats in an all‐Pakistan election last year, is in detention and under going a secret trial in West Pakistan. He is regarded as the leader of Bangla Desh but, of course, can exercise no authority at present.

As India advanced in the east, Indian forces on the west ern border awaited a massive Pakistani attack that India said had not yet come.

Perhaps the most significant claim made by India yesterday was that of Air Marshal H. C. Dewari, who said that India had achieved “complete freedom of the skies” over East Pakistan.

In New Delhi a senior official said that only four Pakistani, F‐86 Sabre jets were still operating in the east.

Independent foreign observers said that Pakistan had been using transport planes to move supplies and men for its 70,000‐man army in the east, and that this would be impossible with out substantial fighter protection.

A senior Indian official in New Delhi called the Pakistani supply problem in the east “hopeless.”

Roads Open to Ambush

Road transport is still possible but roads are open to am bush by the East Pakistani guerrilla forces who are fighting for, independence from West Pakistan.

These were the other main developments today:

Indian officials indicated that in view of what they called Pakistani “aggression” they would no longer honor the cease‐fire and the cease‐fire line that has divided the disputed state of Kashmir, since 1948 and would hold on to any part of Pakistani‐controlled Kashmir they could capture.

¶India warned she would attack any neutral ships found in Chittagong harbor in East Pakistan starting today.

¶The Indian Navy said it suffered no battle damage in the engagement off Karachi in which it reported the sinking of the destroyer Khyber and the destroyer escort Shah Jehan. The Navy said that after the battle it shelled Karachi's harbor installations.

¶Both Indian and Pakistani ground columns made advances of about 15 miles into each other's territory—in the Great Indian Desert on the border of the Indian state of Rajasthan, and the Pakistani province of Sind. These actions were, how ever, probably diversionary and not serious invasions.

¶Aerial combat continued, with India reporting about 100; sorties Saturday and Sunday and Pakistan reported flying considerably fewer. (A sortie is a single flight by a single plane).

Indian spokesmen said 14 Pakistani planes had been destroyed on the ground and in the air since Saturday. They said this brought the total of enemy planes destroyed to 47, including two transports.

India said three of her planes — two Canberras and a Mystere —failed to return from raids over West Pakistan. India says she has lost 14 fighter‐bombers and one light helicopter since the war began Friday.

The claims of the two sides conflicted widely. But even if the claims were accepted uncritically, the ground damage would not seem to be crippling.

Pakistan says she has destroyed 51 Indian planes and 11 tanks in the west. India said she had destroyed 61 Pakistani tanks.

Although the situation in East Pakistan was cloudy because of conflicting claims, there seems to be little doubt that India has made gains. Western correspondents were taken 12 miles inside East Pakistan at one point. The Indians seem to have met fairly small units of Pakistani troops and to have made advances of up to 30 miles in a few areas. But in other areas the advance had been “fairly slow,” a senior official said in New Delhi last night, because they were heavily defended and because India wanted to minimize casualties on both sides.

Indians List Advances

He said the Indian Army intended to bypass the city of Jessore, about 25 miles by road from the West Bengal border. Jessore is under heavy air attack, he added.

The spokesman said that India was determined to honor the Geneva Convention on the treatment of prisoners of war and would protect their safety. He added, “We hope the Mukti Bahini [The East Bengal guerrilla force] will also conform to the Geneva Convention.”

The Indians indicated that what they called “administrative arrangements” to coordinate action with the guerrillas were being worked out.

In the eastern part of East Pakistan, India said she had captured the town of Akhaura from Pakistani troops. Pakistan said the attack had been repulsed.

Other Indian troops were reported to have reached Jamalpur, 30 miles inside the border in the north, Advances in other sectors varied from about 10 to 20 miles, according to the Indians.

In East Pakistan, on the whole, there have been no large territorial gains and no large surrenders of Pakistani troops.

In the west, the situation was different. On Saturday, Indian officials described two “severe” Pakistani attacks one in the Punjab and one near Jaurian in Jammu.

Yesterday they said they had decided that these attacks were essentially “probes” and that Pakistan was feeling out Indian defenses to see where to attack.

India has made clear she will try to overrun East Pakistan and make possible the creation of an independent, friendly government there. A diplomat repeated yesterday that India had “no designs” on West Pakistani territory.

Indian forces captured several Pakistani positions in Sind, west of the Indian town of Barmer yesterday, spokesmen assented, penetrating at one point about 16 miles across the border.

At the same time a Pakistani infantry and tank force pushed about 14 miles into India in an attack that hit, then bypassed Longewalla, 25 miles northwest of Ramgarh in Rajasthan, Indian spokesmen said.

India said she had destroyed 14 Chinese‐made T‐59 tanks in the action and said that 23 additional tanks were “believed” to have been destroyed in an Indian air attack.

The spokesman said India believed that the attack “will now peter out” and that the Pakistani column will have difficulty getting back to its own territory. He said that enemy infantry vehicles were bogged down in the desert sand.

The area in which both sides advanced is of little strategic importance. The important fighting is more likely to take place to the north Punjab and in Kashmir, observers, say.