A 32-year-old man from Crawley has been arrested on suspicion of conspiracy to supply class A drugs and money laundering, said Sussex Police.
The arrest is part of a crackdown on organised crime in the South East.
Detective Sergeant Graham Mepham, from the Regional Asset Recovery Team in SEROCU, said: “This arrest is a result of a detailed investigation into organised crime groups in Crawley.
“We know these crime groups operate without geographical borders and boundaries and therefore it is important we continue to target them no matter where they are located.
“Often criminals use money laundering to legitimise their ill gotten gains, but it is our determination to stop any criminal from benefiting from crime.
“We have worked closely with our colleagues in Sussex police during the investigation and will continue to do so in order to tackle serious organised crime across the south east region.”
The 32-year-old man was bailed until June 29.