Police and paramilitary conducted a joint operation and arrested a militant in Assam.
Acting on a tip-off, a joint security team of police and the Central Reserve Police Force (CRPF) raided a bus and recovered documents, arms and ammunitions from the rebel on Thursday.
"A person named Imtinoon Gasang. After search, one 7.5 mm revolver, pistol, seven ammunition, magazine and scone documents were recovered," said senior CRPF official, Sameer Kumar Srivastava.
More than a dozen insurgent groups have been fighting the government for decades in Assam and neighbouring states of northeast India, killing thousands in attacks on civilian troops and paramilitary.
The groups blame the government of plundering the region's significant mineral and agricultural resources and ignoring demands for greater autonomy and greater economic opportunities.
Myriad violent insurgencies have beset India's remote northeast region for decades and at least 50,000 people have been killed there since independence in 1947.