India's navy and coast guard seized a suspicious boat from international waters off the western coast and detained eight Pakistanis after finding a huge drug shipment aboard, the defense ministry said Tuesday.

Authorities believe the 232 packets of drugs found aboard the boat are heroin worth more than $95 million, the ministry said in a statement.

Satellite phones and a GPS system were also seized in the joint operation Monday involving two navy ships and one coast guard vessel.

The ministry said the eight people detained would likely be interrogated by intelligence officials as well as authorities from the navy and coast guard.