Two months after around 300 South Koreans were detained and deported in a U.S. immigration raid of an under-construction Hyundai factory in Georgia, some workers have returned to the plant.

T. James Rim, president of the Korean American Association of Southeast Georgia, told Yonhap News in a phone interview Thursday that he'd seen three South Korean workers who had been detained in September reenter the United States in October on short-term B-1 business visas.

Lim said the workers had returned to complete their assignments despite their earlier detention.

He added that they used previously issued B-1 visas and encountered no significant problems at airport immigration.

Legal sources in Georgia told Yonhap News that two South Korean workers who had been detained and deported received emails from the U.S. Embassy in Seoul confirming that their B-1/B-2 visas remained valid for the specified period.

In late September, South Korea and the United States held a working group meeting on visa issues, during which U.S. officials clarified that B-1 visas allow for the installation, servicing and repair of equipment purchased overseas for U.S. investment projects.

U.S. authorities also reaffirmed that the same activities allowed under B-1 visas can be performed under the Electronic System for Travel Authorization program.