The drugs haul had an estimated street value of approximately between $4.6 million and $115m according to research published in the International Addiction Review Journal, which said users paid in the range of $10-$25 a pill.

According to authorities, the tablets were found stashed inside shipments marked as car parts that were delivered to the kingdom on a truck.

The four consignees of the shipment were arrested and coordination has been made with General Directorate for Narcotics after the seizure operation at the port was completed.

Amphetamines are largely used by young men and teenaged boys across the Middle East, and the money raised through the sale of all narcotics are usually ploughed back into the drug trade although some find their way into organized crime and terrorism.