Authorities have intercepted a drone carrying more than $1 million of contraband into Townsville Correctional Complex in North Queensland

Eagle-eyed officers noticed the downed device, which was carrying drugs, syringes and a mobile phone, on May 17.

Police and the Corrective Services Investigation Unit are now investigating and have urged anyone with information to come forward.

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Operating a drone over a correctional facility carries a penalty of two years' imprisonment.

Acting Chief Superintendent Silvi Baretta said the find was a result of officers' diligent adherence to security search practices.

"Not only does contraband pose a substantial safety risk, it threatens our ability to deliver meaningful and targeted rehabilitation to prevent reoffending and keep communities safe," Baretta said.

"I commend our officers for their professionalism and commitment to the good order and safety of Townsville Correctional Complex."