Thousands of supporters of India’s youth-led “cockroach” movement protested in Delhi on Tuesday, a day after violent clashes with police, and in spite of Prime Minister Narendra Modi’s vow to punish those behind damaging exam leaks.

More than 5,000 protesters gathered at Delhi’s Jantar Mantar protest site, after their march on parliament to demand the resignation of Education Minister Dharmendra Pradhan ended in violent clashes with police on Monday.

Modi’s comments, reported by a cabinet minister, were his first on the subject since the leaking of question papers for a national entrance test to medical school in May.

The leaks affected 2 million young people and led about a dozen students to take their own lives, according to local media.

Youth anger and protests over the exams have become the biggest challenge for the prime minister in his third term.

Delhi Police said nearly 180 people, including 118 security and police personnel and ⁠60 protesters, were injured when they clashed in central Delhi.

The founder of the Cockroach Janta Party (CJP), a movement that began as an online satire, said more than 150 protesters were undergoing treatment in hospital.

Reuters could not independently verify the numbers of injured, after police beat protesters with batons and fired tear gas rounds to push them back.

Opposition leader Rahul Gandhi detained

A few dozen members of India’s main opposition Congress party, including Rahul Gandhi and his sister Priyanka Vadra, also briefly protested against the crackdown outside Modi’s house on Tuesday, before they were detained by police, news agency ANI said.

ANI visuals showed Gandhi, dressed in his signature white T-shirt and khaki trousers, lying on the road, resisting attempts to remove him, as police officers tried to lift him.

They then showed him being taken away in a police bus along with other members of his party.

One protester held a poster that read, “Democracy bleeds when voices are beaten”, and some Congress members were detained by police, television footage showed.

Modi told lawmakers of his ruling alliance that the government acted immediately on receiving reports of exam irregularities and 13 people were arrested and jailed, Parliamentary Affairs Minister Kiren ⁠Rijiju said.

Modi also said a re-examination had been successfully conducted.

“The prime minister said... that to ensure the future of youth is not jeopardised... everyone should unite to ensure strict steps are taken, those guilty punished, and a foolproof system is created,” Rijiju said.

Protesters say they won’t march again

The CJP movement has said it will continue its anti-government protest but will not march on parliament as it fears its supporters will be beaten by police again.

The months-old movement has drawn the support of millions of young, Gen Z Indians who are demanding the resignation of Pradhan. CJP says the leaking of the papers in May was a sign of ⁠deep-seated corruption in education.

CJP founder Abhijeet Dipke apologised to supporters, especially women, who he said were beaten by male police officers.

Delhi Police said protesters had “displayed unruly, aggressive and violent behaviour” and “deliberately violated the prohibitory orders in force”.

The movement was galvanised after the support of activist Sonam Wangchuk, who began a hunger strike on June 28, but was forcibly moved to a hospital by police on Saturday.

Court allows activist to be moved ⁠to private hospital

On Tuesday, the Delhi High Court allowed the Magsaysay award winner to be shifted to a private hospital following a petition from his wife that alleged he had been illegally detained.

The court order fulfils one of the three demands of the protesters.

CJP said Health Minister J.P. Nadda sought time to discuss their demands within the government after a meeting with ⁠two leaders on Monday.

The demands include the release of Wangchuk, Pradhan’s resignation and compensation of 10 million rupees ($104,000) each for about a dozen students who died by suicide following the leak.

The CJP’s surge in popularity reflects frustrations among young Indians including job shortages as well as exam leaks, which they say happen frequently.