A mother has said she fears 'something bad' has happened to her teenage son who has been missing for more than a week.
Frankie Morris, from Anglesey, attended a party with friends Waunfawr near Snowdonia National Park last Saturday, May 1.
He was last seen the following day pushing his bike near the Vaynol Arms pub in Pentir, North Wales, on CCTV.
In a dedicated Facebook group set up to help share information about his whereabouts, Frankie's mother Alice Morris has said she fears something bad happened to him.
The post, which was shared with the groups 3,800 members, said: 'I know Frankie so well and I also know his lifestyle.
'I do think that he visited one of his friends in Bangor and something bad probably happened to him there.
Police in North Wales are urgently appealing for information relating to the disappearance of 18-year-old Frankie Morris (pictured) who has not been seen since last Sunday, May 2
Pictured: The Vaynol Arms Pub in Pentir, Bangor, where Frantisek Morris, also known as Frankie was last seen and his bike was recovered from nearby by investigating officers
'I have been asking the police to investigate the people who he knows in Bangor and go to their houses to check but the response seems to me to be a bit slow.
'I think they should make it a priority to investigate all his friends in Bangor.'
Now an urgent plea has been shared by police who are investigating the disappearance of the teenager whose full name is Frantisek Morris.
Officers are asking the public to check CCTV and dashcam footage in the Bangor and Caerhun areas of North Wales for any signs of the 18-year-old.
Frankie was last seen on Sunday May 2 after he was spotted near the Vaynol Arms pub in Pentir, Gwynedd at 1.22pm.
Police say Frankie, who is from Llandegfan, Anglesey, was walking north in the direction of Caerhun, wearing a grey T-shirt and blue shorts - the same clothes he wore to the party the evening before - and pushing a bike.
CCTV captured Frankie Morris pushing his bike near the Vaynol Arms Pub on May 9
The bike, which reportedly had a puncture, was found near the Vaynol Arms Pub on May 9.
Officers are now asking anyone with information on his whereabouts to get in touch.
Chief Insp Llinos Davies said: 'I would like to appeal directly to Frankie and want him to know that our only concern is to know that he is safe and well.
'I urge Frankie or anyone who knows of his whereabouts to make contact with us.
'We will need to check on Frankie's welfare, but his confidentiality and wishes will be respected.
'We continue to be concerned about Frankie, and are still utilising a considerable amount of both police and partner agency resources, both of which have been dedicated to finding Frankie for nearly a week.
'We are working closely with Frankie's family to explore every possible line of enquiry at this difficult time.
'If you have any information regarding Frankie's whereabouts, please get in touch.'
It is understand search and rescue teams will be conducting searches with dogs in the area throughout today.
Anyone with information is advised to contact police on 101.