Four people were arrested on suspicion of drugs offences following a pre-planned police operation in Keighley.
Officers from the Bradford Area Drugs Team swooped in the Whinfield Close and West Bank Close areas of the town.
Three men - aged 19, 20 and 38 - and an 18-year-old woman were held on suspicion of possession with intent to supply Class A drugs.
A significant amount of suspected heroin and crack cocaine was seized together with mobile phones and a quantity of money.
All four suspects were released on police bail pending further inquiries.
Detective Inspector Neil Benstead, of the drugs team, said: "Bradford district continues to be at the forefront of the fight against drugs. This is because of the work that is going on, not only from the police, but from the people living in this area. Anyone with information about drug dealing should call Crimestoppers, on 0800 555 111."
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