The top leaders of Indian-origin Madhesi political parties agitating against Nepal's new Constitution will visit India on Sunday to meet top Indian leaders including Prime Minister Narendra Modi, party sources said.

Chairman of Federal Socialist Forum Nepal Upendra Yadav, president of Terai Madhes Democratic Party Mahantha Thakur, president of Sadbhawana Party Rajendra Mahato and chairman of Terai Madhes Sadbhawana Party Mahendra Yadav will leave for New Delhi on Sunday, Madhesi parties' sources said.