Police were called to George Richards Way to reports of a disturbance.
A man was riding his scooter along Manchester Road on June 24th at around midday when he was approached by two masked men on a motorbike. They threatened him with a knife.
The victim managed to escape on his bike and went into a local Asda at Broadheath where the staff alerted police.
The man was not injured and nothing was stolen.
No arrests have been made and enquiries are ongoing.
Anyone with any information is asked to contact police on 0161 856 7530 alternatively call 101 quoting the reference number 847 of 24/06/2019 or call Crimestoppers anonymously on 0800 555 111.