About 100 insurgents, who allegedly crossed Indo-Myanmar international border, attacked the post of 44th AR Battalion (D-Coy) at Komkang area by opening fire from different directions while the jawans were participating in a drill last evening.
A jawan was seriously injured, they said, adding that the exchange of fire between the two lasted for more than two hours.
In a statement signed by Bang Kim, the chief of the publicity section of insurgent outfit Revolutionary People's Front (RPF), political wing of People's Liberation Army (PLA), the attack was carried out by 'tactical command' of the PLA.
Official reports from Ukhrul district said it was not yet known whether the insurgents crossed the international border or not after the attack.
Police forces could not reach the spot immediately due to heavy rain late last evening, they said, adding that ambulance was seen moving to the spot from Ukhrul district headquarters.
Senior AR officials were not immediately available for comment.