A police constable was killed in the Indian capital Monday as clashes between pro- and anti-citizenship law protesters turned violent on the second day of the demonstrations.

The violence began on Sunday when Kapil Mishra, a leader of the ruling Bharatiya Janata Party (BJP), warned police to clear the protests’ site ahead of U.S. President Donald Trump’s official visit.

Protesters threw stones at each other across multiple locations in North East Delhi, one of the 11 administrative districts of the city, and set vehicles and shops ablaze.

The new law guarantees Indian citizenship to non-Muslim religious minorities

Read more: Policeman killed in Delhi protest as Trump visits India