Policemen in plain clothes detain a youth during a protest against a new citizenship law in Ahmadabad, India. Picture: Ajit Solanki/AP

New Delhi – Students involved in a massive weekend protest at a predominantly Muslim university in India’s capital described a clash with baton-wielding police at a news conference Tuesday, while opposition grew nationwide against a new law that provides a path to citizenship for non-Muslim migrants.

A march by students from New Delhi’s Jamia Millia Islamia University descended into chaos Sunday when demonstrators set three buses on fire. Police responded with rubber bullets and tear gas. Video footage showed officers running after unarmed protesters and beating them with wooden sticks.

“The 15th of December is a black day in the history of this country,” human rights activist Farah Naqvi said at the news conference.

The police response to Sunday’s protest has drawn widespread condemnation. It also seems to have sparked an even broader movement against the Citizenship Amendment Act, with demonstrations erupting across the country.

The new law applies to Hindus, Christians and other religious minorities who are in India illegally but can demonstrate religious persecution in Muslim-majority Bangladesh, Pakistan and Afghanistan. It does not apply to Muslims.