India’s main opposition party accused Prime Minister Narendra Modi of using hate speech after he called Muslims “infiltrators” — some of his most incendiary rhetoric about the minority faith, days after the country began its weekslong general election.

The remarks at a campaign rally Sunday drew fierce criticism that Modi was peddling anti-Muslim tropes, AP reported. 

The Congress party filed a complaint Monday with the Election Commission of India, alleging he broke rules that bar candidates from engaging in any activity that aggravates religious tensions.

Critics of the prime minister — an avowed Hindu nationalist — say India’s tradition of diversity and secularism has come under attack since his Bharatiya Janata Party won power a decade ago. They accuse the party of fostering religious intolerance and sometimes even violence. The party denies the accusation and says its policies benefit all Indians.