Thousands of supporters of “cockroach” movement have been camping Delhi to demand the resignation of education minister, in the biggest public challenge to Modi in his third term as the prime minister.

The movement gained momentum following leaks of high-stakes exams and drew wider attention after police forcibly moved hunger-striking activist Sonam Wangchuk.

The months-old movement is seen as the biggest public challenge to Prime Minister Narendra Modi in his third term in office.