Thames Valley Police has released a CCTV image following an assault that occurred at around 4.50pm on Thursday (14/4) outside the post office on Farthing Grove, Netherfield.
The offender rammed one victim with a pushchair, before punching a second victim in the face.
Investigating officer, PC Charlene Rowbotham, based at Milton Keynes police station said: “We are releasing an image of a man we would like to speak to in relation to this incident as we believe he may have vital information.
“We are also appealing for any witnesses or anyone with information about this incident to please get in touch.
“To contact us, call 101 or make a report on our website, quoting reference number 43220161273.
“Alternatively, you can provide information anonymously to the independent charity, Crimestoppers, by calling 0800 555 111 or via its website.”