A total of 1,190 people were arrested in the 12 Malaysian states, with Kuala Lumpur reporting the biggest figure of 464 illegal workers detained since the sweep started before dawn, according to data from the immigration department.
Many of the foreigners arrested were from Bangladesh, Indonesia, Myanmar, Nepal, the Philippines, Pakistan, India and Vietnam, an immigration official said.
Malaysia's Home Minister Zahid Hamidi said the crackdown was launched at the end of a three-month government programme to register illegal immigrants, which began on October 21.
"We discontinued the programme ... as employers were given enough time to process all their workers' documents," he said.
DPA