People living in the area of north Belfast where Noah Donohoe went missing have been asked to check their houses and gardens for any signs of the teenager.
The fourteen-year-old was last seen cycling his bike on Northwood Road shortly after 6pm on Sunday evening.
An eyewitness believes they may have seen Noah fall off his bike and injure his head in the North Queen Street /York Street area beforehand.
In a police press conference on Wednesday Supt Muir Clark asked residents in the Northwood area to search their outbuildings, caravans, and cars.
Speaking at the press conference Supt Muir Clark also made a direct appeal to Noah to come forward, reassuring him he is not in any trouble.
Some of Noah's belongings including his bike and mobile phone as well as his crash helmet, hoodie and trainers have been recovered during searches.
Police believe Noah cycled to Northwood Road, where he abandoned the clothes he was wearing.
He was then seen riding his bike naked.
The teenager's coat, shorts, and backpack containing his laptop have not yet been found.
Noah is thought to have dropped his bike before heading in the direction of Northwood Linear Park, a densely wooded area.
Noah's family are very concerned about his whereabouts, describing what has happened as "completely out of character".
Over the last few days hundreds of volunteers have helped search for the 14-year-old.
On Wednesday afternoon his mother Fiona posted on social media to say she has been overwhelmed by all the support.
She said: "It is actually giving me and my family the strength to fight for him to be found."
His mother continued by asking people in the area to allow police to search their houses in case the teenager was seeking shelter somewhere unnoticed.
She said: "The police can't ask to search but in this situation if people in the vicinity could find it in their hearts to say please search my house to eliminate areas of question.
"My heart is broken I am begging people do this I know I am asking a massive thing but if you knew my Noah he was the most thoughtful loving darling who does not deserve to be suffering or unfound.
"Please hear my plea I am speaking for Noah my baby.
"Please think if it was your child I would let them search my home from top to bottom."
It’s believed Noah left his home in the south of the city at around 5.30pm on Sunday.
Chief Inspector Gavin Kirkpatrick said: "Noah left his home on his black Apollo mountain bike wearing a black skateboarding helmet, khaki green North Face jacket, grey sweat shorts with an emblem on one leg, a tie-dye blue hoodie, Nike trainers with a bright yellow 'tick' and carrying a khaki rucksack.
Police say Noah was seen on Ormeau Avenue at 5.45pm on Sunday evening and was spotted again on Royal Avenue heading towards York Street a short time after.
An eye witness has come forward to say they saw a young man matching Noah's description fall off his bike, and potentially injure his head, in the North Queen Street/York Street area.
Chief Inspector Gavin Kirkpatrick continued: "We believe Noah got back on his bicycle, cycling into Northwood Road where he then abandons all his clothing, as he is seen a short time later cycling while naked.
He added: "We believe Noah then dropped his bicycle and left the area on foot.”
There have been no further confirmed sightings of Noah since 6.11pm on Sunday.