The police detained three persons from the Mehrauli bus stand, a senior police official said.
The protesters shouted slogans, unfurled Tibetan flags and called for India's support and global intervention in securing freedom for their homeland.
'As the world's largest democracy with history of struggle based on Mahatma Gandhi's principles of non-violence and non-cooperation, India has a moral obligation to stand in solidarity with the Tibetan people's non-violent struggle for freedom,' Dorjee Tsetan, National Director of Students for a Free Tibet-India, said in a statement.
Meanwhile, Indian members of Students for a Free Tibet launched an online petition addressed to External Affairs Minister SM Krishna urging him to make a strong statement 'condemning China's crackdown in Tibet' and calling for a multilateral forum to resolve the crisis.
Organisers said the petition will be delivered to him on October 2.