Video
Click here to see video of the bees in Market Square
The enormous collection of flying insects gathered on the corner of a bedding plant stall at about 1pm.
The swarm, three times the size of a football, caused panic among lunchtime shopppers who fled for cover to escape the ordeal.
Eyewitness Steve Riches, aged 60, of Flore, said: "There were thousands of them circling above the stall. It looked like a whirlpool.
"Then they picked a corner and settled there. Some people were running like hell to start with."
The swarm was still on the stall a couple of hours later, with shoppers and traders giving them a wide berth.
Did you see the bees? Call reporter Ed O'Mara on Northampton 467035 or email ed.omara@northantsnews.co.ukWould you like free daily emails alerts giving you the big news and sports stories from the Chron? Click here to see how you can receive this great new service.
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