Police have raided an industrial unit in Armley over suspected drugs offences.
Officers are still at the scene at the industrial park in Forge Lane, just off Canal Road.
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West Yorkshire Police said officers executed a warrant under the Misuse of Drugs Act at 8am this morning.
A large group of officers and several police cars were seen gathered nearby in Pickering Street just after 7am before making their way to Canal Road.
A police spokesman said: "Officers are currently at the scene and the operation is ongoing."
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Details on what has been seized are yet to be released.