An Indian judge has sentenced a self-styled "godman" to 20 years' jail for two rapes but a shoot-to-kill order, curfew and heavy police presence kept protesters at bay.

Last week, Gurmeet Ram Rahim Singh's followers went on a deadly rampage after he was convicted.

A spokesman for the Central Bureau of Investigation, which investigated the case, said late on Monday that Singh would serve two consecutive 10-year-terms for the two rape convictions. It had earlier been announced they would be served concurrently.

Tens of thousands of police enforced a lockdown in large parts of the northern states of Haryana and Punjab where Singh, 50, has a mass following.

Police in Haryana issued orders to shoot protesters on sight ahead of the sentencing and ordered the hearing to be carried out inside the prison where Singh was being held.

Hundreds of followers went on the rampage when he was convicted on Friday, attacking train stations, buses and television vans.

At least 38 people were killed and more than 200 injured, triggering criticism that Prime Minister Narendra Modi's ruling party, which also governs the state of Haryana, was unable or unwilling to act against Singh's followers.

The case dates back to 2002 when two women followers accused Singh of rape at the headquarters of his Dera Sacha Sauda organisation in the town of Sirsa.

Singh, also known as the guru of bling for the bejewelled costumes he wears in self-produced films, faced a minimum of seven years under tough new rape laws.

Singh's lawyer, A.K. Panth, said his client was innocent and would appeal. Vipassana Insaan, a spokeswoman for the Dera Sacha Sauda, urged Singh's followers to respect the court's order.
Indian TV channels reported that Singh broke down after the sentence was passed and refused to move out of the court room, saying he was innocent.

The prison in the town of Rohtak, 66km from New Delhi, was transformed into a fortress, with journalists banned from approaching within a mile (1.6km) and roads were lined with barbed-wire barricades.

V. Umashankar, a special commissioner in Haryana, said a curfew was in force in the town of Sirsa and parts of Rohtak.

Nirmaljit Singh Kalsi, an official in Punjab, said paramilitary forces were patrolling public places to maintain order.

Singh claims more than a million followers on his website.

In 2015, Singh started a film franchise portraying him as MSG or "Messenger of God", performing miracles, preaching to thousands and beating up gangsters while singing and dancing.

Singh also faces charges of murder in two separate cases and is accused of castrating 400 men inside his ashram to help them get closer to God.