Amnesty International urged the Tamil Nadu government to protect Sri Lankans visiting or living in the State.
It said the authorities in Tamil Nadu must immediately put in place measures to ensure the safety of Sri Lankans visiting and living in India.
Amnesty International India’s Chief Executive said in a statement They must promptly launch investigations into the attacks, and ensure that those responsible are brought to justice in fair trials.
On Sunday, the State government ordered two visiting football teams from Sri Lanka, including a school team, to be sent back.
Soon after the attack on buses transporting pilgrims, the Government of Sri Lanka advised its citizens to avoid visiting Tamil Nadu in the interest of their safety.
The chief executive said every visitor to Tamil Nadu must be able to enjoy the right to freedom of movement, religion and expression, as guaranteed under the Universal Declaration of Human Rights.