NEW DELHI: Thousands of Indian farmers protesting against agricultural reforms breached barricades on Tuesday to enter the historic Red Fort complex in the capital and hoist flags after clashing with police, who fired tear gas to scatter them.

Growers, angered by laws they say help large, private buyers at the expense of producers, have camped outside New Delhi for almost two months, posing one of the biggest challenges to Prime Minister Narendra Modi since he came to power in 2014.

The body of one protester draped in an Indian tricolour lay in a central Delhi street after the tractor he rode overturned in one of the clashes, said a witness, Vishu Arora.

"He died right there," Arora added.

A Reuters witness saw at least five police and three protesters injured at the Red Fort, from whose ramparts Modi delivers an annual speech. Some of those who scaled its walls carried ceremonial swords, overwhelming police who were trying to prevent them from entering.

The government ordered internet services in some parts of the capital to be blocked, according to mobile carrier Vodafone Idea, in an attempt to prevent further unrest. Tens of thousands of bearded and turbanned farmers, many bundled against the winter cold, began the day in a convoy of tractors festooned with Indian and union flags along the city's fringes.

But hundreds of protesters soon broke away from pre-approved routes, heading for the city centre where the government was holding an annual Republic Day parade of troops and military hardware on Tuesday morning.

"Modi will hear us now, he will have to hear us now," said Sukhdev Singh, 55, a farmer from the northern state of Punjab, who was among hundreds of protesters, some on horseback, who broke away from one of the three protest routes.—Reuters