New Delhi, July 10 -- Police have arrested the principal and another staffer of a private school in Thane where girl students were allegedly made to strip to check if they were menstruating, officials said on Thursday.

"The incident occurred at the school in Shahapur area of Maharashtra's Thane district on Tuesday after bloodstains were found in its toilet," PTI reported, citing an official.

It sparked outrage among the girls' parents, who protested on the school premises on Wednesday and sought action against its management and the teachers involved in the episode.

The police on Wednesday night arrested the school's principal and a woman attendant who allegedly stripped the students and checked their private parts for menstruation, an...