Lincolnshire Police arrested a Lincoln teenager in relation to a robbery in the city on Tuesday.
Officers were called to Smith Street in Lincoln just after 5pm on September 13 after a report that a 16-year-old boy had been approached by an offender on a bike, who threatened him with violence and stole his mobile phone.
A 17-year-old local man was arrested in connection with the incident. He is currently being questioned at Lincoln Police Station.
Anyone with information on the incidents should contact Lincolnshire Police on 0300 111 0300, or call Crimestoppers on 0800 555 111.