Police have searched more properties in connection with the Manchester Arena attack as officers made a fresh arrest as part of the investigation.
A search was carried out at a property in Moss Side, with dogs seen at the scene and police closing off roads in the area.
Greater Manchester Police said a 25-year-old man had been arrested in the Old Trafford area on suspicion of offences contrary to the terrorism act.
As it stands 14 people in total have been arrested in connection with the investigation, of which two people have since been released without charge.
Officers have also been searching properties in the Rusholme and Gorton areas of Manchester as part of the investigation.
The latest operation came just hours after the Home Secretary warned that members of bomber Salman Abedi's terror network could still be at large.
Amber Rudd said parts of the suicide attacker's circle were "potentially" unaccounted for, despite optimism that a previous wave of arrests had quelled further threats.
On Saturday night, police issued CCTV stills of Abedi, bespectacled and casually clothed, in a plea for information about his movements between May 18 and the attack.
A matter of hours after he was captured on camera, the 22-year-old was dead, having inflicted an outrage on a pop concert attended predominantly by young girls.
The huge police response that followed saw raids in several cities as counter-terror efforts were focused on cornering his suspected criminal ring.
As the huge counter-terror operation continued, the NHS said 54 people injured in the attack were still being treated in eight hospitals with 19 receiving critical care.
A total of 116 people required hospital care in the wake of the massacre, police previously said.