A 23-year-old man has been arrested in connection with the deadly bombing Monday at a Manchester, England, concert venue that killed at least 22 people.

"With regards to last night’s incident at the Manchester arena, we can confirm we have arrested a 23-year-old man in South Manchester," Greater Manchester police tweeted.

With regards to last night’s incident at the Manchester arena, we can confirm we have arrested a 23-year-old man in South Manchester. — G M Police (@gmpolice) May 23, 2017

The attack, which police are treating as a terrorist incident, killed at least 22 people and wounded dozens more.

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British Prime Minister Theresa May had previously said that police and security staff in Manchester believed they knew who carried out the attack, but were declining to reveal the name, the Associated Press reported.

"This attack stands out for its appalling, sickening cowardice," she said.

The Islamic State in Iraq and Syria (ISIS) on Tuesday claimed responsibility for the deadly attack.