Online Listing News: * 7 workers killed, several trapped after explosion in Sikkim tunnel, rescue ops on  India Today
* 1 Killed, Several Trapped In Sikkim Tunnel After Landslide Triggers Gas Leak  NDTV
* 12 workers trapped in Sikkim tunnel after landslide blocks entrance  The Times of India
* Landslide traps about 27 workers inside under-construction Sikkim tunnel; gas leak slows rescue  Telegraph India
* 7 killed, several feared trapped after explosion in under-construction tunnel in Sikkim  Deccan Herald
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