A huge area of grassland is taped off and under police guard in a Sheffield suburb this morning.
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The cordon takes in an area of land at the junction of Station Road and Moss Way in Mosborough.
Officers are guarding the scene.
Police sniffer dogs are reported to have been deployed to the scene and police officers have been spotted searching the land.
Details on the nature of the incident under investigation have not yet been released by South Yorkshire Police.
More to follow.