A young girl was approached by a man who asked her to go with him.
The 10-year-old was in Servite Close, Bognor, on Sunday when she was approached by the man at around 3.30pm.
She refused and ran off to the safety of her family – however was left shaken by the incident.
The man is described as being white, in his 20s, about 5' 8", slim build, with blonde gelled hair with brown bits showing through, styled with a quiff and wearing red shorts and a white vest top.
DS Jo French said: "There was no physical contact and the girl was physically unhurt, however she was scared and shaken by the interaction and did exactly the right thing by immediately returning to her family and telling them what happened. The man left Servite Close and went into the alleyway that leads towards Marshall Avenue.
"We have increased our patrols of the area and please talk to our officers if you have any information or any concerns. At the moment we are not linking it to any other incident. If you saw this interaction or this man around the area or have any other information that relates please contact Sussex Police on 101 quoting serial 1011 of 29/6."