Police are investigating a robbery in Caldicot last month.
It happened outside the One Stop Shop in Caldicot Town Centre at around 12.30am on Sunday 21 August.
A 19-year-old man was reportedly assaulted by a man and his mobile phone taken.
The victim was taken to hospital by paramedics for treatment.
Officers arrested a 17-year-old boy and an 18-year-old man from the Caldicot area on suspicion of robbery.
Both were later released under investigation as enquiries continue.
Police are now appealing for anyone with information, including CCTV or dashcam footage to come forward.
Hereford gears up for a poptastic Christmas Lights Switch-On featuring local acts
Pizza Hut Hereford to close permanently
Revealed: The main roads in Herefordshire prioritised for repairs
Appeal to find missing Monmouthshire man
Man arrested in connection with stabbing incident
New Food and Drink group launched at online event