An eight-year-old boy and four protesters were killed in India on Friday in clashes between police and demonstrators, officials said Saturday, as unrest over a controversial citizenship law rages into a second week.

Police banned protests in New Delhi and several state capitals Thursday in an effort to contain growing dissatisfaction over a new citizenship law that opponents say threatens the secular nature of Indian democracy.

Protesters said they will go ahead with a demonstration at New Delhi's iconic Red Fort and surrounding historic district.

Fresh protests rocked India on Monday as anger grew over new citizenship legislation slammed as anti-Muslim, after six people died in the northeast and up to 200 were injured in New Delhi.

The law fast-tracks citizenship for non-Muslims from three neighbouring countries. Critics say it is part of Prime Minister Narendra Modi's Hindu nationalist agenda to marginalise the 200-million strong Islamic minority.

Authorities deployed thousands of paramilitaries and blocked mobile internet in northeast India Thursday, while police fired blank rounds at protesters who defied a curfew to demonstrate against contentious new citizenship legislation.

At least 17 people from four families in India were buried alive as they were sleeping on Monday when heavy rains caused a large wall to collapse on their homes, police said.

At least one person was killed and 17 wounded Monday in a grenade blast at a crowded market in Indian-administered Kashmir's main city Srinagar, police and doctors said.

The Indian government said Saturday it would unblock most mobile telephone lines in Kashmir in a major easing of a two-month-old security clampdown since cancelling the region's autonomy, but a grenade attack in the main city highlighted tensions over New Delhi's actions.

The death toll in eastern India from torrential late monsoon rains has risen to nearly 140, officials said Tuesday as hospitals and schools were inundated with dirty rainwater.

At least 44 people were killed and thousands moved to relief camps because of flooding caused by torrential rains in northern India's Uttar Pradesh state, officials told AFP Saturday.

Pakistan fired back Wednesday at New Delhi's "jingoistic rhetoric" after India's foreign minister vowed to retake Islamabad's portion of the disputed Kashmir region as tensions flare between the nuclear-armed rivals.