The 24-year-old was arrested after the attack at Manchester Arena, as police looked for evidence of a terror network in the area.
Police investigating the Manchester suicide bombing evacuated an area of the city yesterday after finding a auto that may have been used by Salman Abedi as he prepared for his attack.
Detective Chief Superintendent Russ Jackson, head of the North West Counter Terrorism Unit, said: "This is potentially a significant development in the investigation". They have put a cordon around the area, evacuated nearby buildings and asked people to stay away.
Police investigating last week's bombing in Manchester, England, said they have found a vehicle that might be "significant" in the case, the BBC reported Friday.
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Earlier on Friday, police evacuated a part of Rusholme after discovering a auto that "may be significant to the investigation".
According to Sky News broadcaster, Salman's brother Ismail Abedi, 23, was arrested on May 23. "I think they are getting people out of there section by section".
The latest reports by police came as the American singer Ariana Grande visited fans injured in the attack.
That Abedi was in contact with the terrorist cell brings up the possibility that Islamic State operatives in Libya have now twice directed attacks in Europe.