Manipur Police have seized 49.5 kg of opium in Senapati district, an official statement said on Tuesday.
A police team conducting naka checking at T Khullen along Imphal-Dimapur NH-2 on Sunday morning signalled a four-wheeler to stop, but the vehicle sped away.
The police team chased the vehicle and later found it abandoned at some distance.
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On scrutiny, the team found 49 packets of opium weighing a total of 49.5 kg concealed in compartments of the floor of the vehicle.
Police also seized the identity documents of the owner of the vehicle, following which he was arrested.
A case has been registered, and efforts are being made to trace and arrest the driver of the vehicle as well, the police statement added.