Police investigating the disappearance of a teenager two weeks ago have arrested three people.
Frantisek Morris, who is known as Frankie, was last seen walking with his bicycle in Pentir, near Bangor, at about 1.20pm on Sunday, May 2.
His mum Alice has posted on the Help Find Frankie Morris Facebook page to express her concerns about his welfare, saying she was worried that "something bad" has happened to him.
The 18-year-old had attended a party in Waunfawr, near Snowdonia National Park, the night before his disappearance.
North Wales Police have said that a man has been arrested on suspicion of causing death by dangerous driving in connection with the case.
A second man and a woman were held on suspicion of perverting the course of justice.
Officers said they had spoken to a cyclist who was caught on CCTV in the area but he was no longer part of their investigation.
Chief Inspector Owain Llewelyn said: "Due to the ongoing investigation, the road from Pont Felin, Pentir heading towards Waen Wen will be closed until further notice."
He also appealed for a number of drivers to get in touch. You can see the full appeal here.
North Wales Police also want to talk to three male cyclists seen near the pub at about 1.45pm that day.
Many volunteers have been involved in the search for Frankie, using drones and dogs.
CI Llewelyn said "several useful reports and pieces of information" were being assessed.
Police have also made a further appeal for anyone who attended the rave at the disused quarry in Waunfawr to contact them using using this link, and it can be done anonymously.