The Premier League club confirmed on Monday that Johnson would not play for them while a police investigation is ongoing, shortly after reports first emerged that he had been taken into custody.
A club statement said: "Sunderland AFC has confirmed that Adam Johnson has been suspended from the club, pending the outcome of a police investigation. No further comment will be made at the present time."
Earlier, Durham Police revealed: "A 27-year-old man was arrested earlier today on suspicion of sexual activity with a girl under 16.
"He remains in police custody and is helping officers with their enquiries."
Get the best features, fun and footballing frolics straight to your inbox every week.
Thank you for signing up to Four Four Two. You will receive a verification email shortly.
There was a problem. Please refresh the page and try again.