A man was struck with a hard object, which fractured the bone around his eye during a robbery in Milton Keynes this week.
The 36-year-old man fell to the ground during the attack on the redway between St Leger Drive and Granes End in Great Linford.
He was then kicked while he lay on the ground - while his attack stole his white iPhone 4 and black Samsung Tocco mobile phones were stolen.
It happened between 7pm and 7.30pm on Monday.
There is no description of the offenders.
Police are appealing for witnesses who may have seen the offenders in the area or anyone acting suspiciously.
Anyone with information should contact Det Con Susan Russell of Milton Keynes local area CID via the Thames Valley Police Enquiry Centre on 101.
If you don’t want to speak directly to the police, you can contact Crimestoppers anonymously on 0800 555 111.
No personal details are taken, information is not traced or recorded and you will not go to court.