Police have revealed two tactics farmers can use to combat hare coursing.
Rural crime officers say digging ditches around open land can stop coursers' vehicles in their tracks.
Those taking part in the illegal bloodsport often use 4x4s to drive onto farmers' fields.
A Range Rover suspected of carrying coursers ended up on its side in a ditch as it fled from police at Thorney, near Wisbech.
Officers also recommend planting cover crops on fields of stubble to disrupt dogs' sight lines. Greyhounds and lurchers used by coursing gangs need to be able to see their quarry to chase it.
Yesterday three men were reported on suspicion of coursing and had their mobile phones seized at March.
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