Humberside Police are appealing for witnesses following a robbery on Queensgate Park in Bridlington at 7.20pm on Sunday October 18.
A 31-year-old man was reading a text while walking through the park when two unknown men allegedly tried to take his mobile phone.
When the victim resisted he was punched twice in the face. Following a short scuffle the offenders ran off without the phone.
The victim sustained a swollen eye and minor cuts to his face.
Officers would like to speak to anyone who witnessed the assault. Anyone who can assist should call 101 quoting crime reference number 2145416 or Crimestoppers anonymously on 0800 555 111.