Two .303 rifles recovered, two gun silencers and a pistol was recovered from the poachers.
Earlier this month, two poachers were killed in an encounter with forest guards in the Bagori Range area of the national park, famous for its one-horned rhinos.
According to officials, five to six poachers had entered the park. While two were killed, the rest managed to escape.
On December 31, a female rhino was killed by poachers at the park located in Assam's Sonitpur district. An Assam Home Guard, part of the force that guards rhinos at National Parks, was also killed by the poachers.
In 2014, the forest department killed 22 poachers in the state.
Assam is home to the world's largest population of one-horned rhinos, an endangered species.
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