The Indian government on Tuesday advised its nationals to exercise caution and adhere to the steps and guidelines issued by the Nepali authorities amid the violent protests in Kathmandu that left 19 people dead.

The Indian government mourned the loss of lives in the violence.

"We are closely monitoring the developments in Nepal since yesterday and are deeply saddened by the loss of many young lives. Our thoughts and prayers are with families of deceased. We also wish speedy recovery for those who were injured," MEA said in a statement.

India described Nepal as a 'close friend'.

"As a close friend and neighbour, we hope that all concerned will excercise restraint and address any issues through peaceful means and dialogue," it said.

The statement further said: "We have also taken note that authorities have imposed curfew in Kathmandu and several other cities of Nepal. Indian nationals in Nepal are advised to exercise caution and adhere to the steps and guidelines issued by the Nepali authorities."

Nepali authorities have imposed curfew in Kathmandu, Lalitpur and Bhaktapur districts of the country, a day after violent protests over social media ban in the Himalayan nation left at least 19 people dead.

According to local media reports, the Kathmandu District Administration Office has imposed an indefinite curfew inside the Ring Road area of the capital city.