One of Chloe Rutherford and Liam Curry's best friends is appealing for help to find the South Shields couple after they went missing following the explosion in Manchester.
Amy Ridley has told ITV News Tyne Tees that she has spent all night using social media to try to find her friends.
"I want to hear my best friend's voice again and make sure her and her boyfriend are okay! I love them both and wouldn't know what to do without them. I've been up all night messaging, sharing, phoning everybody and anybody to find them. I pray and plead for everyone to get sharing to help find these two amazing people."
- Courtesy of Ellie Cheetham
This video shows the moment an explosion went off at an Ariana Grande concert at Manchester Arena killing at least 22 people.
Concert-goers are heard screaming and asking "what's going on?" as they flee the scene.
Police say children are among the dead and a man who detonated an explosive device died in the blast.
Twenty-two people, including children, have died as a result of the Manchester Arena blast suspected of being carried out by a single attacker, Greater Manchester Police have confirmed.
A further 59 people were injured in the explosion.
GMP's chief constable Ian Hopkins said a man detonated an "improvised explosive device" outside the Arena and died in the attack.
They believe he acted alone but said the priority was to find out if he was part of a wider network.
"This is the most horrific incident we have ever faced," he said. "We have been treating this as a terrorist incident."
He added: "I can confirm children are among the deceased."
Family and friends of Courtney Boyle and Philip Tron are appealing for help to find them. They are missing following an explosion at Manchester Arena.
National Rail have tweeted that trains from Lime Street and Newcastle will operate between Manchester Piccadilly and Newcastle only.
They have also said that customers may use Virgin Trains East Coast via 'any reasonable route'.
- Emergency number for those concerned about their loved ones: 0161 856 9400
At least 19 people have died and 50 have been injured after an explosion at the Manchester Arena.
Greater Manchester Police said the explosion at the end of a concert by US singer Ariana Grande is being treated as a terrorist incident.
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broken. from the bottom of my heart, i am so so sorry. i don't have words.
Chloe Rutherford and Liam Curry have not been seen since the explosion at Manchester Arena. They had been at the Ariana Grande concert where 19 people were killed and 59 people were injured.
Concerned relatives and friends have been urged to call 0161 856 9400 - an emergency police hotline set up after the explosion at Manchester Arena on Monday evening.
Greater Manchester Police are also offering help or assistance at the city's Etihad Stadium.
Anyone who needs help or assistance after last night's incident at Manchester Arena help is available at the Etihad Stadium access Gate 11
Anyone with information about the blast should call the national anti-terrorist hotline on 0800 789 321.
Anyone with footage from Manchester Arena that could assist the police investigation has been urged to upload it to the site for Police Appeal For Photos/Videos.
Chloe Rutherford and Liam Curry from South Shields are missing following an explosion in Manchester. 19 people have been killed and 50 people are injured.
Friends and family of Chloe and Liam have taken to social media to locate them.
North Yorkshire Police have provided a number for those concerned about loved ones in Manchester, following an explosion at Manchester Arena last night.
Police are currently treating it as a terrorist attack until they know otherwise. So far, 19 people have been confirmed dead with around 50 injured.
Officials say they are still working at the scene and continue to ask the public to avoid the area.
The police say anyone concerned about loved ones should call 0161 856 9400.