Police said today a cordon has been placed around a property south of central Manchester.
There are 11 men in custody for possible connection to Britain's worst extremist attack in more than a decade.
Suicide bomber Salman Abedi, a British-born man with Libyan descent, detonated a device minutes after the conclusion of an Ariana Grande concert at Manchester Arena on May 22.
Five other people, including a woman, have been questioned and released without facing charges.