Police said Sharma, who was absconding, was arrested last night following a tip off and with his arrest the number of those taken into custody has risen to 168.
Life in the hills was paralysed for the ninth day today amidst the 72 hour deadline set by Chief Minister Mamata Banerjee to withdraw the bandh.
There were reports of poor people walking long distances to reach Darjeeling in search of provisions.
All shops and other commercial establishments have been closed since the beginning of indefinite bandh.
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Vehicular traffic on NH-31A, the lifeline of Sikkim, was also nil, the sources said.
GJM leaders and supporters gathered at the main areas in Darjeeling town and shouted slogans in support of Gorkhaland and against the government's deadline.
Meanwhile, cable TV operators have resumed services after being ordered to stop yesterday.