Sunderland have on Friday confirmed that a probe into a bottle throwing incident during the side's clash with Sheffield United has concluded with an arrest.
Sheffield United goalscorer Clayton Donaldson appeared to be hit by an object launched from the South Stand at the Stadium of Light last Saturday.
A Sunderland club spokesman said: "Using video footage, an individual has been identified and subsequently arrested after a plastic bottle was thrown during the recent game against Sheffield United at the Stadium of Light.
"Affording a safe and welcoming environment to everyone who attends games is paramount and our club will always have zero tolerance to any behaviour that negatively impacts on the safety of those in our care."