Chief Minister Buddhadeb Bhattacharjee held an urgent meeting with state Chief Secretary Ardhendu Sen, Home Secretary Samar Ghosh, DGP Bhupinder Singh and Urban Development Minister Asok Bhattacharya and reviewed the situation in the hills.
Tamang was killed by unidentified assailants in Darjeeling town.
Condemning the attack, Bhattacharjee directed the hill administration and the police to take immediate action against the assailants. He also called for stepping up security in the entire hill areas, official sources said.
The state's urban development minister also condemned the incident and said the assailants should be immediately arrested.
Trinamool Congress condemned Tamang's killing in broad daylight in and alleged that there was no security of life of common people in the state and sought Central intervention.
"Mamata Banerjee is shocked along with all sections of Trinamool Congress workers at Tamang's murder and expressed the view that her party is always against politics of violence," party general secretary Partha Chatterjee said in a release.
"Law and order has collapsed in the state and it is time the Centre intervened to ensure security of life and property of people," the release said.