Police seized £250,000 worth of suspected class A drugs in a raid in Liversedge.
A West Yorkshire Police spokesman said: "At 12.10pm on Friday a search warrant was issued under the Misuse of Drugs Act at an address in Third Avenue, Liversedge.
"A substantial quantity of what is believed to class A drugs was recovered."
Four people were arrested after the raid and were being held in Dewsbury.
A fifth man was arrested a short time later in connection with the seizure after a vehicle was stopped by police in the Manchester area.
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