The Rajasthan-bound truck coming from Manipur was stopped at Srirampur check gate.
An alleged drug trafficker transporting heroin and opium worth Rs 20 crore to Rajasthan was injured in police firing early on Saturday after he "snatched a revolver from a sub-inspector and opened fire" in Assam's Kokrajhar district, an officer said.
Police claimed that some unidentified people later set the truck ablaze but the drugs were shifted from the vehicle by then.
The Rajasthan-bound truck coming from Manipur was stopped at Srirampur check gate along the West Bengal-Assam inter-state boundary and 3.1 kg of heroin and 85 kg of opium were seized from the vehicle, the officer said.
The driver, hailing from Barmer in Rajasthan, was arrested. He revealed that there is an associate of his in Gossaigaon, around 10 km from Srirampur.
The police then started taking the accused to Gossaigaon by foot, when he suddenly snatched the service revolver of SI Brijesh Kumar and opened fire in the early hours of Saturday, the officer said.
"In retaliatory firing, the accused sustained bullet injuries and was admitted to Kokrajhar Civil Hospital, where he is undergoing treatment. In the meantime, some unidentified people set the empty truck on fire," he said.
"In an operation conducted at Srirampur Gate, @assampolice seized 3.1 kg Heroin and 85 kg opium from an accused who was carrying it from a neighbouring state of Assam to another state in North India. Keep up the good work," Chief Minister Himanta Biswa Sarma tweeted.
Around 46 people have been gunned down and 113 others injured in incidents of police firing since May last year when Mr Sarma assumed power.
In all the cases, police claimed that they had to open fire when the accused either tried to flee from their custody or shot at them.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)