Police are appealing for help from the public in relation to two offences that happened on the riverside path in the Dudley Road area of Grantham on Monday May 12.
Two boys, aged 13 and 12, have been arrested and subsequently bailed in connection with the incidents but officers would still like further information.
At around 4.15pm on May 12 a 12-year-old boy was walking along River Walk with a friend when he was approached by two boys.
They came up to the victim and searched his pockets before running off. Nothing was stolen from him and he was not injured in the incident.
In a second incident on the same day, which is thought to have happened around 4.25pm, a 13-year-old boy was walking along the cycle path towards the bridge on Dudley Road when he was approached by two boys, thought to be aged in their early teens.
They told the victim to empty his pockets and when he refused he was punched in the face.
Two suspects have been arrested in connection with the incidents and subsequently bailed pending further enquiries, but officers are still keen to hear from any members of the public who may have witnessed either of the incidents.
DC Bob Jones of Grantham CID, who is investigating the incidents, said: “We have identified and questioned two suspects in connection with both of these incidents but are still appealing to the public for any further information.
“It was a busy time of the day and there were a number of people in the area at the time and we are keen to hear from them in case they have any information that may help assist with our enquiries. I am particularly interested to trace two male joggers and female who may have directly intervened in the incidents.
“If you saw either of the incidents take place please contact us and give us that information. It may not seem to be too significant but sometimes even the smallest seeming pieces of information can help us complete the entire picture of what has happened.”
Anyone with any information is asked to contact Lincolnshire Police on 101 quoting incidents 314 or 391 of 12/05/2014. Alternatively contact the independent charity Crimestoppers anonymously on 0800 555 111.