Special to the New York Times

NEW DELHI, March 27--Pakistani Government troops supported by artillery and air force jets were reported battling on many fronts today with the forces of Sheik Mujibur Rahman, the nationalist leader of East Pakistan.

According to one Indian press report, the Pakistani Army has killed more than 10,000 people, most of them by artillery and tank fire. The air force was reported to have bombed Comilla, a town of 50,000 people, which is said to be under the control of Sheik Mujib's forces.

Another Indian press report quoted Sheik Mujib's clandestine radio report as having said that Lieut. Gen. Tikka Khan, the martial-law administrator of East Pakistan had been assassinated. Other reports said that the general had been seriously injured, but not killed by a shot.

Attacked at House

He was reportedly attacked at his house in Dacca this afternoon by members of Sheik Mujib's Awami League.

[The official Pakistani radio was reported by United Press International to have said that the army was in full control in East Pakistan and that reports of fighting by some foreign news agencies were without foundation.'

The Awami League volunteers were reported to have been joined in the over-all fighting by the East Pakistan Rifles, the provincial militia, and East Pakistani policemen. They were reported to be battling central Government troops in many towns and cities, including Dacca, Khulna, Daulatpur, Chittagong and Rangpur.

In a broadcast, Sheik Mujib was said to have denied a West Pakistani radio report that he had been arrested. "I'm free and all right," he was quoted as having said. "Comrades, go ahead with your program to achieve the goal of freedom. Do not be misguided by enemy propaganda."

The fighting between the troops of the central government in West Pakistan and the East Pakistanis was reported to have erupted yesterday. A proclamation of the East's independence, attributed to Sheik Mujib, was also reported then.

Sheik Mujib has been campaigning for autonomy for East Pakistan, which his followers now call Bangla Desh-- Bengali for Bengal Nation. The autonomy movement in the eastern wing of Pakistan, which is separated by 1000 miles of India is based on the two sections completely different cultures, languages and physical features as well as on the fact that the western wing has dominated the eastern since the Moslem country was carved from the Indian subcontinent in 1947.

Assembly Postponed

Pakistan's President, Agha Mohammed Yahya Khan, in a nationwide radio broadcast last night, charged Sheik Mujib and his followers with treason and outlawed the Awami League. In three weeks of strikes and other protests against the central Government it had in effect gained control of the region from the martial-law authorities.

The Awami League's protest had been directed against President Yahya's decision to postpone the March 3 opening of the National Assembly which the league would have dominated, to start drafting a constitution to return Pakistan to civilian rule.

President Yahya said in his speech that he was ordering the army to restore the Government's authority to save Pakistan's integrity. President Yahya had been in Dacca for 10 days, discussing the political crisis with Sheik Mujib and political leaders from West Pakistan. He slipped out of Dacca unannounced on Thursday and flew back to West Pakistan.

The negotiations over East Pakistan's demands for self rule had broken down on Thursday afternoon, although this was not known until the Army went into action.

The president said that it had been his "keenness to arrive at a peaceful solution" that kept him from taking action against Sheik Mujib "weeks ago."

For 17 days, ever since the Army killed scores of demonstrators, the Bengali population had supported Sheik Mujib in refusing to cooperate with the martial- law regime.

In his speech, President Yahya said the army had been "subjected to taunts and insults of all kinds."

"I compliment them on their great restraint and sense of discipline," he continued. "I am proud of them."

Indian news agencies remained the major source of news from East Pakistan. After the martial-law administrator imposed strict censorship on reporters in Dacca, news began to come out from many Indian tons bordering East Pakistan.

Sheik Mujib's forces were said to have effectively obstructed the movement of Pakistani troops by blowing up bridges and railroads; even in normal times, East Pakistan crisscrossed by many rivers, is difficult terrain in which to move fast. Central Pakistani forces were also said to be handicapped by inadequate stocks of gasoline. The supplies must be brought in by air from West Pakistan.

Reports of more troops

News reports quoting East Pakistani sources said that West Pakistan was flying more troops into Dacca's airport to reinforce the 70,000 men already in the East. Meanwhile new martial law regulations were broadcast to warn people against putting up barricades on the roads and on airport runways.

According to one report of the fighting, Pakistani Government troops were forced to withdraw with heavy casualties after attacking a center of the East Pakistan Rifles in Khulna.

In Daulatpur, near Khulna West Pakistani troops were reported to have fired into a crowd, killing 90 civilians. Reports also said that West Pakistani soldiers were shelling and burning houses and factories as Awami League volunteers poured into towns from their villages and attacked the troops.