Gangtok, June 30 -- A coordinated operation by central intelligence agencies and Gangtok Police has unraveled a suspected Pakistan-linked terror network functioning out of Sikkim, resulting in one arrest and the brief detention of five other individuals in what officials are calling a significant security development for the border state.

The man at the center of the case, Mohammad Arju, nineteen, lives in the Nam Nang locality of Gangtok and ran a paan shop near Lower MG Marg alongside his father. He was taken into custody after a focused raid at that location.

Officials say Arju had been on the radar of central agencies for close to eight months, ever since his online conversations with a suspected handler based in Pakistan first drew...