Drugs with a potential street value of more than £400,000 have been recovered by Jersey Customs in the past fortnight.
Officers have thwarted seven commercial consignment attempts over the past two weeks, recovering cocaine, heroin, MDMA (ecstasy) and cannabis.
The drugs were imported either via an arriving passenger, or through parcels sent through the post or freight deliveries.
In one package, heroin was found hidden in sweet wrappers, mixed with genuine sweets.
Another was found to contain 1,000 MDMA tablets, weighing more than half a kilo.
Three houses have been searched and four people have been arrested, with one charged and three released on Customs bail pending further investigation.
Jersey Customs and Immigration Service Senior Manager Luke Goddard says the recent seizures demonstrate the team's ability to protect the island from dangerous drug imports.
"Despite the resulting high workload from investigating these cases, which are still ongoing, we have been able to simultaneously deal with peak passenger numbers coming through the ports and not unduly delaying the travelling public."
Public Health recently issued a reminder on MDMA safety:
Anyone with information on drug smuggling can report it anonymously on 0800 735 5555 or through CrimeStoppers online.
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