Ten thousand people, most of them Moslems, fled into Bangladesh from Burma yesterday, saying they had been forced out of their homes by the Burmese army, according to reports reaching here.

This would bring to 30,000 the number estimated to have fled into Bangladesh in recent days, many of them accusing the Burmese army of torture, rape and robbery. One group said soldiers fired on them, killing 100.

Bangladesh has sealed off its border to prevent a further influx. Refugees already here say there may as many as 60,000 more persons trying to cross the frontier.

Bangladesh has sent a letter to the government in Rangoon expressing "concern" for the plight of what it termed "Burmese nationals." Dacca maintains that the Moslems have been living in what is now Burma for generations, going back to the period when the region was part of the Bristish colonial empire.

Burmese officials, however, have claimed there have been recent waves of illegal immigration from Bangladesh. Bandladesh contends that such a mass movement could have been easily detected.

Burmese Ambassador U Thein Wyn has been called to the Bangladesh Foreign Office several times in the past few days and invited to visit refugee camps.

One refugee, Sikim Ali, 56, who arrived in Bangladesh two days ago with his wife and three children, said Burmese soldiers came to the village where he had lived for 20 years and ordered everyone to leave. Some persons were beaten and houses were set on fire, he said.

"Some of the soldiers even raped our women," he said.

Sultani Begum, 24, said she had lost her husband when she fled her village at night. "They killed my uncle and chased all of us out of our homes," she said at a camp near the border town of Taknap.