Police were called in on a search for a missing child in Spalding on Thursday night.
A boy, believed to be aged four, went missing in the Horseshoe Road/Horse Fayre Fields area at about 7.45pm.
Lincolnshire Police refused to confirm any details, but did say the boy was reunited with parents “within the hour”.
A spokesman said: “We are very grateful to anyone who assisted in our endeavours to reunite this child with his parents.”