Police have not publicly linked the incident with any reports of a missing girl, but say the witness is credible and they are focused on locating the child.
Const. Ian MacDonald says the witness reported seeing a young girl, about six to 10 years old, lying on the side of the road near Enterprise Avenue and McCallum Road at 6:20 p.m. PT Tuesday.
The motorist said the girl was wearing a pink jacket and didn't appear to be moving, and a white man in his 40s, who had curly brown hair and was wearing jeans and a dark jean jacket, was with her.
"The witness observed the man pick the girl up off the ground and carry her in the direction of a treed area just to the west of that location," MacDonald said in a written statement.
Central Fraser Valley Search and Rescue joined the search, just after 9 p.m., but it was called off at 3:30 a.m. because of darkness.
Google Maps: Enterprise Ave. & McCallum Rd.