Seven financial institutions in Korea, including banks and securities firms, are facing regulatory scrutiny after being caught discriminating against “non-regular” workers following a nine-month investigation.

The probe is part of a government clampdown on discrimination of temporary workers. The investigation from the Ministry of Employment and Labor uncovered 62 cases of bias in 12 institutions, including paying temps lower wages and making them work longer hours than full-time colleagues. The financial firms have so far not been named.