A large-scale search of bushland on NSW’s mid-north coast for signs of missing boy William Tyrrell has wrapped up.

A team of specialist officers led by the homicide squad started the fresh forensic search on June 13 in an area near his grandmother’s home in Kendall, where William was last seen in September 2014.

“While police have not located William or evidence of William being in the search areas, Strike Force Rosann detectives have gathered information relevant to the investigation,” NSW Police said on Thursday.

Police had spent days scouring two areas of bushland near the Benaroon Drive home in a hunt that involved 50 specially trained officers and a cadaver dog.

The second area to be searched covered just 800 square metres and was a six-minute drive from William’s foster grandmother’s home.

Police earlier said they were convinced someone in the tiny NSW mid-north coast town knew more about William’s disappearance than they were letting on. They also said their focus group of potential suspects had narrowed to just a handful – although they were tight-lipped about specific numbers and identities.

Detective Chief Inspector Gary Jubelin called on anyone who had seen suspicious activity in the area to come forward.

-with AAP