Three men have been arrested for Class A drug offences as part of a 10-month drugs operation in Northamptonshire.
Another man has been charged with handling stolen goods.
They were charged yesterday as part of Operation Pyramid in Wellingborough, which has already seen 69 arrested in the past two weeks.
Currently, 50 people have been charged as part of the operation in connection with 144 offences.
A number of them are due to appear at Northampton Crown Court next week.