Five demonstrators died Tuesday after being shot by police in Nepal as anger deepened over the country's draft constitution.

Police shot dead four people from the Madhesi ethnic minority in separate incidents in the south of the country.

Nepal police fired into a crowd of demonstrators on Monday, killing one person as fresh protests erupted in the country's southern plains over a new draft constitution.

The incident in Parsa district, 95 kilometers (60 miles) south of Kathmandu, came a week after violent clashes in southwestern Nepal saw eight police and an 18-month-old boy killed, prompting the government to deploy troops and announce an indefinite curfew.

Landslides triggered by heavy rainfall killed at least five people in central Nepal, four of them in a shelter for survivors of a devastating earthquake, police said Friday.

Rescuers in Nepal's Nuwakot district are still searching for a nine-year-old boy missing since an overnight landslide crushed two bamboo and tin shelters built for families displaced by the April 25 quake.

Nepal police shot dead a protester as fresh clashes erupted in the country's southern plains Tuesday, a day after an 18-month-old boy and seven officers died during demonstrations against a new constitution.

Monday's violence in Tikapur prompted the government to deploy troops in the town overnight, while the country's human rights watchdog sent a team to monitor the situation.

Demonstrators armed with spears and axes killed eight police officers in western Nepal on Monday during escalating protests against a proposed new constitution, officials said.

The government announced a curfew and plans to send in the army to Kailali district in the country's remote far west, where authorities said there were reports that three demonstrators may have also died.

Nepalese police arrested 30 demonstrators in the capital on Sunday for trying to enforce a nationwide strike, the latest in a string of protests against the new constitution.

"We have arrested 30 demonstrators in Kathmandu for trying to block roads, vandalise vehicles and close shops," police spokesman Kamal Singh Bam told Agence France Presse. 

Nepal police fired into a crowd of demonstrators protesting against a proposed new constitution on Tuesday, killing one and injuring several others.

National police spokesman Kamal Singh Bam said the clashes broke out in the southeastern district of Saptari when protesters tried to block a major national highway.

Nepal police on Monday arrested dozens of protestors against a proposed new constitution after they attacked vehicles and forced shops to close on the second day of a nationwide strike.

The shutdown was called to protest plans to restructure Nepal as a federal state comprising six provinces, with opposition parties saying the new internal borders discriminate against historically marginalized communities.

Nepalese police arrested more than a hundred protestors on Sunday for trying to enforce a nationwide strike, the latest in a string of protests against the new constitution.

"The police have arrested 112 cadres from across the country for vandalism and for forcing shops to shut down," police spokesman Kamal Singh Bam told AFP, adding that protestors have attacked 16 vehicles.

Nepali politicians including Prime Minister Sushil Koirala appealed for calm Tuesday as hundreds protested against a new constitution for a second day after police shot dead two people during a demonstration.

Police fired rubber bullets and tear gas at hundreds of protestors amassing in the country's troubled midwest, the day after two demonstrators were shot dead by security forces in a bid to fend off an attack on the home of a local lawmaker.