Two bikes were stolen in a knifepoint robbery at a park last week.
The terrifying incident happened at Nuttall Park in Ramsbottom at around 5.50pm on Wednesday, June 19.
No arrests or injuries have been reported following the robbery.
If you have any information about the incident, contact police on 101 or call the independent charity Crimestoppers, anonymously, on 0800 555 111.
Elsewhere in Bury, police have reported a "spike" in home burglaries in the Redvales area.
A police spokesperson said there will be "increased high visibility patrols in the area during the peak times".
Residents have been warned to remain vigilant and keep their homes secure.
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