Several people were arrested then released without charge after police executed a number of warrants in Chesterfield.
A Derbyshire police spokesman said offices carried out the warrants on Thursday as part of an intelligence-led investigation.
A number of people were arrested and all were released without charge.
The Derbyshire Times asked the spokesman what the people were arrested on suspicion of. The spokesman replied: “As there was no evidence and they were released without charge we feel that it would be unfair to release that information.”