GUWAHATI, India: Angry protesters in northeast India vowed yesterday to keep demonstrating against a contentious citizenship law as the death toll from bloody clashes opposing the bill rose to six. Tension remained high at the epicenter of the unrest in Assam state's biggest city, Guwahati, with troops patrolling the streets amid tight security. In Assam, four people died after being shot by police, while another was killed when a shop he was sleeping in was set on fire and a sixth after he was beaten up during a protest, officials said.

Some 5,000 people took part in a fresh demonstration in the city yesterday, with hundreds of police watching as they sang, chanted and carried banners with the words "long live Assam". The legislation, passed by the national parliament on Wednesday, allows New Delhi to grant citizenship to millions of illegal immigrants who entered India from three neighboring countries on or before Dec 31, 2014 - but not if they are Muslim.

Besides stoking concern among Muslims, the proposed changes have also led to demonstrations by residents unhappy about an influx of Hindus from neighboring Bangladesh who stand to gain citizenship. "Assam will continue to protest. India is a democracy and the government has to listen to us," said Karan Mili, a colleague of one of the victims, 25-year-old Iswor Nayak, who died yesterday. "We don't want violence but protests will continue… Assamese will not stop until government revokes the law," another demonstrator, Pratima Sharma, told AFP.

Officials said oil and gas production in the state were hit by the curfew, although the restrictions were eased during the day on Sunday with some shops opening. In West Bengal state, where protests stretched into a third day, Chief Minister Mamata Banerjee - who has spoken out against the national government's push for the law - suspended Internet services in several districts.

Demonstrators set fire to tyres, staged sit-ins on highways and railway tracks, and torched trains and buses, with riot police brought in to disperse protesters and train services suspended in some parts of the east. In India's capital New Delhi, video shared on social media showed a bus on fire and police appearing to fire tear gas at protesters.

Prime Minister Narendra Modi blamed the opposition Congress party for the violence. "To give respect to those who fled to India and were forced to live as refugees, both houses of parliament passed the Citizenship Amendment Bill," he said Sunday at a rally in eastern Jharkhand state. "Congress and its allies are stoking fire over the Citizenship Act but people of northeast have rejected violence… They (Congress supporters) are resorting to arson because they did not get their way."

Home Minister Amit Shah yesterday called again for calm, saying local cultures in northeastern states were not under threat. "Culture, language, social identity and political rights of our brothers and sisters from northeast will remain intact," Shah added in Jharkhand, News18 television network reported him as saying. For Islamic groups, the opposition, rights activists and others in India, the new law is seen as part of Modi's Hindu-nationalist agenda to marginalize India's 200 million Muslims. He denies the allegation.

Rights groups and a Muslim political party are challenging the law in the Supreme Court, arguing that it is against the constitution and India's secular traditions. Modi's Bharatiya Janata Party (BJP) ally in Assam, Asom Gana Parishad, which had supported the bill in parliament, told local media yesterday it now intended to challenge the law in the Supreme Court. - AFP