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14 September 2012, 17:18 | Updated: 14 September 2012, 17:24
Police have increased their patrols in Henlow after Stanley knife blades were found embedded in playground equipment.
The discovery was made in the park at about 5pm on Thursday afternoon.
A member of the public found the three blades embedded in the monkey bars. They removed them and called the police.
Officers went to the park and took the blades away.