A group of five suspected militants of the anti-talk ULFA faction came to the house of Arvind Shah, a small trader, and fired indiscriminately at those outside it around 7.30 pm.
One person, identified as Kishori Teli, died on the spot while the two injured were admitted to hospital, police said.
Senior police and civil officials have rushed to the area where security measures were tightened.
Suspected ULFA-I militants yesterday exploded an improvised explosive devise (IED) in a drain near a tea garden in Philobari but none was injured.
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