KARACHI, April 12 — The administration in Dacca, the capital of East Pakistan, announced today that Government troops had destroyed all “subversive elements” around a key railhead and it promised that the lives and property of “minorities and other people” in the eastern wing of the country would be protected.

The declarations were made over the official Pakistan radio, which called on Government employees in East Pakistan to return to work. In addition citizens in Dacca were warned by the press and radio to take precautions in case there should be an outbreak of cholera.

The central Government's announcements indicated that it believed itself in effective control in the east wing, where a movement for autonomy by the eastern‐based Bengali party, the Awami League, brought a violent Government crackdown last month. The autonomy movement took a militant turn after President Agha Mohammed Yahya Khan postponed the meeting of the National Assembly in which the Awami League had won a majority.

“Pakistan zindabad, Allah 0 Akbar!”—“Long Live Pakistan, Allah is Great!” townsfolk shouted today during a patriotic demonstration near the railhead, according to the Pakistani news agency.

The radio said that the army's victory over the “subversive elements” had been in the Chandpur area. Chandpur is a town on the Ganges River that is at the head of the railroad that goes south to Chittagong, East Pakistan's main port.

The radio gave no casualty figure or details of the clash, but said “these elements were creating fear in the local population, which then asked the help of the armed forces.”

The radio also reported that an army column had advanced unimpeded from Dacca 70 miles northwest to Pabna. The troops “did not encounter any subversive or antisocial elements” on the way, the radio said.

Made in Governor's Name

The Dacca provincial administration's assurances about lives and property were made in the name of Lieut. Gen. Tikka Khan, the artilleryman who is East Pakistan's governor and military commander. As quoted by the radio, the general said that “patriotic and peace‐loving people should not be disturbed anything.”

He was said to have “assured minorities and other people that the administration would take all measures for the protection of their lives and property.”

The radio added that “authoritative source in Dacca today categorically denied allegations that Hindus had now become the main target to attack in the port town of Khulna and surrounding areas controlled by West Pakistani troops.”

The radio said that the report, by an Indian journalist, had been an attempt to “cover up the large‐scale infiltration into East Pakistan of Indian Hindus who were being dealt with as any other miscreants.”

Return to Work Ordered

The radio said that the Dacca administration had so far not punished people who had not returned to work “in view of the genuine difficulties faced by many employees.”

But it warned “now that the situation has returned to normal” all the employes must report for work by April 21 or be liable to dismissal or jail terms of up to seven years.

The populace was also warned that “possibilities still exist for an outbreak of cholera in Dacca city.” A vast cholera inoculation drive was said to be under way.