Yechury, in his letter, said that representatives of the Centre, the West Bengal government and the Gorkhaland Janmukti Morcha should meet to tackle the "grave situation" that has arisen in the hilly areas of Darjeeling and Kalimpong districts of the state.
He also expressed concerns over reports of "serious human rights violation" in the wake of "virtual" economic blockade following the unrest, triggered after the state government's announcement of making Bengali a mandatory language.
"It is clear that the restoration of peace and normalcy in the area can happen only through a dialogue for which the process of talks between three parties that created the Gorkhaland Territorial Administration (GTA) must immediately begin," Yechury said in the letter.
He also enclosed two letters from ex-Darjeeling MP Saman Pathak to give "an idea of the hardships that the people in the region are facing" following the unrest.