Young protesters in India are camping on the streets of New Delhi. Protesters defied heavy security measures Thursday in the latest show of strength by a movement posing a major challenge to Prime Minister Narendra Modi’s government.

Television visuals show police caning protesters in a heavily barricaded area; Delhi police say the “protest is being handled professionally”.

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