A large amount of drugs, including ecstasy, mephedrome, cannabis resin and cannabis grass was found by the Police Drug Squad in a residence in Msida this afternoon.
Sources said the police, led by Inspector Pierre Grech, had been working on the case for several days.
The police also found other items used in drug trafficking.
The case is being seen as important since the people involved appeared to be supplying a number of 'drug distributors'.
At least two people are expected to be taken to court.