Ganja worth Rs 1.38 crore was seized on Saturday from an abandoned truck parked near a dilapidated structure in Manpada area of Thane city, police said.
Police official Avinash Ambure said the truck was located at around 4am following a tip-off.
"We found corns in the truck at first but a detailed search revealed 691 kilograms of ganja (cannabis) worth Rs 1.38 crore under a tarpaulin. We could not find anyone near the truck. It is possible the driver etc may have escaped. We have registered a case under NDPS Act," he said.
Probe into the details of the truck, its route history and those operating the ganja smuggling network was underway, Mr Ambure said.