KARACHI, Pakistan, April 17.-The Pakistan radio said tonight that Pakistani troops yesterday evening "secured" Chuadanga, the town "that Indian propagandists had been claiming as the seat of the so-called Bangla Desh Government."

"The troops moved into the town without firing a shot," the radio said, "and found no trace of a ghost government-which it appears exists only in the imagination of the Indian propagandists."

The radio reported other military successes in East Pakistan tonight.

Meanwhile, a furor arose here in West Pakistan over reported remarks by the United States Ambassador to India, Kenneth B. Keating. Mr. Keating, a former United States Senator from New York, is reported to have said in Bombay Thursday that the East Pakistan problem was the concern of the world community and not merely Pakistan's internal affair.

PARTY CRITICIZES KEATING

The spokesman of West Pakistan's strongest political party, the Pakistani People's Party, criticized Senator Keating, saying it was "surprising that a government that insisted upon its right to intervene in Vietnam should be caviling at Pakistan's right to restore order in an integral part of her territory."

Similar criticism came from another political party and from West Pakistan officials and intellectuals. The furor was played up in the Pakistani press.

According to a Reuters dispatch, as published in the papers here, Ambassador Keating said to reporters in Bombay, "This phrase 'internal affair' has a certain international usage, but it should not be overdone."

He reportedly said that the official United States view was that as far as East Pakistan was concerned, the meaning of the phrase was "limited to the geographical fact that what is taking place is within [Pakistan's] territory."

The Pakistani Government has repeatedly asserted that the East Pakistan problem is its own business and nobody else's.

No official reaction was forthcoming from the Pakistani Government yesterday-Friday is the Moslem holy day-but Karachi's largest evening paper, The Daily News, reported tonight that Pakistan "is likely to protest to the United States against the remarks made by the American Ambassador in India."

It was understood that the matter was under study by the Pakistani Government, which was awaiting confirmation of the initial Reuters reports.

INDIAN INTERFERENCE DENOUNCED

The Pakistan radio also denounced what it termed Indian interference and infiltration in the East.

Reporting that the Chuadanga area had been "combed and cleared of miscreants," the radio said:

"All sources of supply to the infiltrators and antistate elements in the area have been sealed off. Short of supplies, they are now completely demoralized and disarrayed. They also loot foodstuffs from private houses and harass peace-loving civilians. These elements are being chased and wiped out."

It also broadcast this account of other reported achievements: "Another column of the Pakistani Army yesterday reached Kushtia 25 miles east of the border and 100 miles northeast of Calcutta and fully secured the town without facing much resistance. In the region cleared of miscreants, rural people have resumed their normal work."

It continued: "In a mopping-up operation in the border belt of Jessore district, Pakistani troops ambushed an Indian supply column near Benapol [a town five miles east of the border]. The infiltrators were killed and their war material was seized. The captured arms include rifles, machine guns and mortars, and the captured ammunition bears the markings of the Kirkee ordinance factories of India."

INDEPENDENCE CEREMONY

Baidyanath, Tala., PAKISTAN.-The independence of Bangla Desh was formally proclaimed today in this East Pakistani town a half mile from the Indian border.

The troops of Pakistani's central Government were but 30 miles away and the resistance of Bangla Desh or Bengal Nation- the East Pakistani autonomy movement- was crumbling steadily.

The acting president of Bangla Desh, Syed Nazrul Islam, and Prime Minister Tajuddin Ahmed appealed for recognition by foreign powers.

The Indian authorities played a major part in the ceremony, and a contingent of Indian troops was on hand just across the frontier.

Mr. Nazrul told a crowd of applauding Bengalis that he was proclaiming the " independent Democratic Republic of Bangla Desh" on behalf of its leader, Sheikh Mujibur Rahman. The Pakistani Government has announced that Sheikh Mujibur is in custody.