The number of people charged as part of a major crackdown on serious crime has risen to 20.
Thames Valley Police launched Operation Stronghold, which involved a series of drug raids in Oxford, Abingdon and London, last month.
Londoner Tabu Dan Melle, 28 of Hammersmith and Fulham, became the 20th person charged as part of the drug shutdown when he was arrested on February 4.
He was charged the same day with two counts of conspiracy to supply class A drugs, relating to offences between July 13 and November 23 last year.
Melle appeared at Oxford Magistrates Court on Monday last week and was remanded to appear at Oxford Crown Court on February 24, alongside 13 others.
Of the 20 charged, 16 are male and 10 are from Oxfordshire.
Five other men and a woman have been arrested and bailed to various dates in March.