The teenager was arrested today, Friday July 7, on suspicion of offences contrary to the Terrorism Act and currently remains in custody.
A property on Thelwall Avenue in Fallowfield is being searched as part of the investigation.
A Greater Manchester Police spokeswoman told us: “A man has been arrested in connection with the investigation into the attack at Manchester Arena.
“A-19-year-old man was arrested at Liverpool John Lennon Airport on Friday 7 July 2017. He was arrested on suspicion of offences contrary to the Terrorism Act and remains in custody.
“A property on Thelwall Avenue in Fallowfield is being searched as part of the investigation.
“As it stands 23 people have now been arrested in connection with this investigation, of which two were quickly de-arrested, and 20 were released without charge.
“One person remains in custody.”
Twenty-two people were killed and dozens more seriously injured when Salman Abedi, 22, detonated a device as fans left Manchester Arena, where US star Ariana Grande was performing.