The Centre also sought a detailed report on the prevailing situation in the hill district from the state government.
A Union home ministry spokesperson said that as many as 600 paramilitary personnel, including 200 women, were sent to Darjeeling.
Around 400 personnel, already stationed in West Bengal, have also been deployed in the hill areas along with additional forces.
The home ministry said it was closely monitoring the situation in Darjeeling and was ready to offer all assistance to the state government to restore normalcy there.
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She, however, said that the Centre did not seek any report on the Darjeeling situation from the state government.
As their indefinite shutdown entered its second day today, protesters demanding a separate state of Gorkhaland hurled stones at the police at Chowkbazar area in Darjeeling after they were stopped from enforcing their shutdown in many government offices.
Senior police officers were seen leading large police contingents in various parts of the hills.
Police pickets and barricades were put up in front of the government and the Gorkhaland Territorial Administration (GTA) offices and various entry and exit points of the hills, while Rapid Action Force (RAF) and a sizable number of women police personnel were also deployed.
The Gorkha Janmukti Morcha (GJM) leadership, however, accused the police unprovoked lathi-charge on its procession.
"The police resorted to unprovoked lathi-charge on a peaceful rally. The more they use force against us, the more intense will be the struggle for a separate Gorkhaland state," GJM general secretary Roshan Giri told PTI.
Yesterday too, Gorkhaland supporters vandalised government offices as the GJM-sponsored indefinite shutdown forced tourists out of the picturesque hill station due to threat of violence.
The GJM, which controls the GTA, has called a shutdown of all state and GTA offices to press its demand for creation of a separate state.
Their next meeting has been scheduled on June 20 to discuss the future course of action, he said.
GJM chief Bimal Gurung said that he was in constant touch with the Centre and was hopeful that its ally the BJP would consider its demand for a separate state "compassionately".
"I am constantly in touch with the central government and various ministers. I am very hopeful that they will understand our pain and struggle and will consider our demand for a separate state of Gorkhaland.
BJP, he said, has always been in favour of small states.
The GJM chief slammed West Bengal chief minister for calling out the Army to control the situation in the hills and advised her to stay away as "the people of Darjeeling are well equipped to take care of themselves".
"My advice to Mamata Banerjee is please stay away from the hills. We don't need your charity. The people of the hills will not accept TMC's hegemony," he said.
Hitting out at the chief minister for calling the Army to control the situation in the hills, Gurung said, "Mamata Banerjee is just pursuing opportunist politics.
"We are not like her. We respect the Indian Army. Every year hundreds of youth from the hills join the Indian army," he said.