Ten people -- seven women and three men -- were killed in a forest fire in Kurangani hills in Western Ghats on Saturday, with the incident sending shock waves.
Ranjith was arrested last night, they said, adding that he was being questioned to ascertain whether he had any links with a Chennai-based group which is believed to have arranged for the expedition that turned tragic.
Police are probing, among others, how the trekkers came into contact with Ranjith, a local.
The team included 25 women and three children.
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