KARACHI, Pakistan, April 13 —The Pakistan radio said tonight that Pakistani troops had “destroyed all miscreants” in the area of Dinajpur in East Pakistan and had captured “large amounts of Indian arms and ammunition.

This was the first time that the Government had reported capturing large amounts of ordnance.

The radio reported the engagement after warning that officers and men absent from their units in East Pakistan would be declared deserters if they did not report to military authorities immediately.

The account of the fighting said that the “miscreants” had been harassing the local populace before they were “pursued and destroyed.” This assertion was in line with a variety of Government measures announced today that, taken as a whole, constituted a drive to generate support for the national Government in East Pakistan, where the army began crackdown March 25 on movement for autonomy.

As part of the bid for popular support, groups called “peace councils” are to be set up throughout the area to work for what the Government press agency called “the restoration of confidence and peace.”

The Government made no comment today on China's promise of support for Pakistan if India should attack her, but Peking was praised in the press and by political parties. There was no significant comment on Washington's decision to review military sales to Pakistan.

China's support was apparently particularly welcome to the man in the street here today, because newspapers were playing up a report from New Delhi that Indian and Pakistani troops were poised only a few miles apart along the border between East Pakistan and India.

“India Plans Invasion” was the headline in the Karachi Evening Star.

The Government radio did not give the whereabouts of the troops and officers who were absent from their units in East Pakistan or how many men were involved. The radio merely announced that personnel who were on leave in East Pakistan and had not yet reported to their units were being instructed to report.

By Government accounts the atmosphere was serene in Dacca. The radio reported that people from all walks of life marched in procession through Dacca “carrying national flags and banners” and expressing “determination to safeguard the country's integrity and solidarity.”

The press agency said:

“With the return to normality in Dacca, it has been reported that certain miscreants and antisocial elements are indulging in acts of highhandedness and harassment of peace‐loving citizens in certain localities.

The Evening News Leader, which like all karachi papers is loyal to the national Government, said in an editorial: “China has done well to warn India of the consequences of Indian intervention in the internal affairs of Pakistan.” The powerful left ‐wing Pakistan People's party, lead by Zulfikar All Bhutto, issued a statement saying, “When Chou En‐lai has told the Indians about noninterference,” it is a guarantee for the peace in the area.