Malaysian authorities rounded up 425 undocumented migrants in an apartment block in Cheras.

According to Kuala Lumpur immigration department director Syamsul Bahrin Mohshin, the raid at Cheria Heights apartments was carried out following investigations and surveillance for two weeks, Free Malaysia Today.

Syamsul said residents had complained about the number of foreigners in the area and that they were causing various social problems.

“In the operation carried out by 60 staff between 1am and 4am this morning, a total of 425 undocumented migrants were arrested for not possessing valid identification documents, overstaying or possessing expired temporary work permits, in addition to unrecognised card holders," Syamsul was quoted as saying by the newspaper.

“Those arrested consist of 252 Bangladeshis, 108 Myanmars, two Filipinos, 30 Indonesians, six Cambodians, 20 Nepalese and seven Pakistanis, all of whom are between eight and 54 years old,” he said at a press conference after the operation.

The detained people were reportedly working in various industries including construction and cleaning.