The police first opened this particular investigation just over two weeks ago with the arrest of five people, including a member of the Guardia Civil.
According to the National Police drugs squad, the nine suspects arrested to date are all alleged to have been involved with smuggling large amounts of Ketamine into Majorca from Asia.
Ketamine is a drug used in human and veterinary medicine and has a wide range of effects in humans, including analgesia, anesthesia, hallucinations and elevated blood pressure.
But, according to the police, the organisation was apparently involved in the smuggling of ecstasy into the region after 1'000 tablets were found at a property in Puigpunyent last week which is where the first five suspects, including the member of the Guardia Civil, were arrested.
According to the police, the gang began operations back in January and while the Ketamine came from Asia, the ecstasy was shipped in for the Majorcan market from Ibiza.
The Ketamine was apparently posted to Palma, hence the apparent involvement of the post office worker.
He would tip the rest of the gang off about the shipment's arrival and then ensure they were handed over without arousing any suspicion.
However, one of the packets containing Ketamine was intercepted by customs in Madrid and allowed to continue to Palma after the National Police in Majorca had been tipped off.
The police then followed the packet to its final destination in Puigunyent where the property was kept under close surveillance until the decision to move as given by police chiefs and the five were arrested.