The Welsh mum of a man who went missing after attending a birthday party has made an emotional plea for help to locate "her son, her world". Jack O'Sullivan was last seen walking near Bristol city centre, along Brunel Lock Road, on Saturday, March 2 at 3.15am, having attended a birthday party in the Hotwells area.

Avon and Somerset Police, which is investigating the 22-year-old's disappearance, said that at 3.24am, he had attempted to make a call to a friend who was still at the party, but when the friend called back ten minutes later, Mr O'Sullivan answered but only managed to say "hello" before the line cut out. His phone remained active on the Find My Friends app until 6.44am.

Catherine O'Sullivan, from Neath, shared a photo of her missing son on social media, together with the message: "This is my son, my world. He is missing but questions still remain for us.

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"Why, oh why, is his phone still in use over two hours after we saw him on CCTV footage? Please share this far and wide, we just need help in getting this message across.

"We must get an answer to be able to put one foot in front of another and move forward. Please help us." For the latest analysis of the biggest stories, sign up to the Wales Matters newsletter here.

Jack O' Sullivan
The 22-year-old hasn't been seen since Saturday, March 2

Detective inspector Jason Chidgey, of Avon and Somerset Police, said: “This is an extremely distressing time for the loved ones of Jack and we’re continuing to carry out urgent enquiries to establish what happened to him. We’re keen for the public to focus on the time of the last confirmed sighting and we still want to speak to anyone driving on the Cumberland Basin around this time, as well as anyone driving outbound towards Ashton, as they may have dashcam footage which could help us.

“We previously issued a CCTV image showing a person in Hotwell Road at around 5.40am the same day. Following further enquiries, we’ve now established this was not Jack.

"We’re in daily contact with Jack’s family to keep them updated on the progress of our investigation and to ensure they have the help and support they need. To date we’ve carried out an extensive CCTV trawl as well as searches of the local area, including the deployment of our specialist dive team to search the river Avon.

“If you saw Jack after 3.15am on Saturday, March 2, we want to hear from you. He’s described as white, around 5ft 10ins, of slim build, with short brown hair.

"He was wearing a quilted green/brown Barbour jacket over a beige woollen jumper, with navy chinos and brown leather trainers with white soles.” Join our WhatsApp news community here for the latest breaking news.