A Roman Catholic nun from Japan has been arrested and charged on suspicion of helping priests sexually abuse children at a school for youths with hearing disabilities in Argentina.

Kosaka Kumiko, 42, was charged with helping the priests with anal and vaginal rapes, fondling and oral sex, which were allegedly committed in the bathrooms, dormitories, garden and a basement at the school in Lujan de Cuyo, a city about 620 miles northwest of Buenos Aires.

The case against Kumiko began after a former student accused her of making her wear a diaper to cover up a hemorrhage after she was allegedly raped by priest Horacio Corbacho. 

'I am innocent,' she told judicial officials, who ordered her to be taken into custody at a local women's prison while detectives investigate the alleged crimes.