The police believe he assembled his deadly bomb in a rented Airbnb flat in a mansion block on Granby Row in the city centre, near Canal Street.
Abedi, a 22-year-old Briton of Libyan descent, died in Monday's explosion, which killed 22 others and wounded almost 120 as crowds were leaving an Ariana Grande concert.
No details of the gig have been confirmed as of yet but there are reports that it could be held as soon as 4 June and feature several celebrity guests. A threat level of severe means an attack remains highly likely.
Hashim Abedi is being detained by Libyan authorities along with his father in connection with the attack at the end of a concert by the pop singer Ariana Grande.
Investigators have searched 17 properties, including bomber Salman Abedi's home in south Manchester and other houses in nearby districts.
The announcement came as an evacuation took place in Moss Side as part of a search linked to the Manchester terror attack. Photos showed an army bomb-disposal unit at the property.
London, May 28 almost 23,000 terror suspects may be at large across Britain, the country's intelligence community say after the deadly manchester attack by a Libyan-origin man who was on the radar of the UK's spy agencies.
"We thought he must have been a drug dealer or doing witchcraft", El-Hudarey told the BBC.
British authorities say they have disrupted five plots since March 22, when a terror attack outside Parliament in London left five people dead.
More than 1,000 armed police are on standby as major events including the Football Association Cup Final and the Premiership Rugby Final are expected to draw tens of thousands of people.
The New York Times has defended its decision to publish crime scene photographs of the Manchester bombing, saying that the "images and information presented were neither graphic nor disrespectful of victims".
"We will be thinking about all the people who died and were injured", she said. The U.K.'s terror alert reached "critical" following the bombing, but as of Saturday, it's down to "severe", where it had been since 2014. I don't want to alarm people but I do want to level with them: "This is a hard environment, people are going to want to do damage".
On Friday she pledged to return to the city to hold a benefit concert to raise money for the victims and their families.
"Until the operation is complete, we can't be entirely sure that it is closed", Rudd said.
"Sadly we've seen an increase in hate incidents since the bomb from 28 on Monday, which is our normal average a day, through to 56 on Wednesday", he said.