A property in Whalley Range, Manchester, was among two addresses searched by police
Police have named 22-year-old Salman Ramadan Abedi as the person suspected of carrying out the suicide attack at Manchester Arena on Monday evening.
Abedi was born in Manchester on New Year's Eve 1994 to Libyan parents, who had fled that country after becoming opponents of Colonel Gaddafi's repressive regime.
Having spent a few years in London, the family moved to Manchester where his father used to do the call to prayer at a mosque in Didsbury.
Abedi went to school in Manchester and on to Salford University before dropping out, and worked in a bakery. Friends remember him as a good footballer, a keen supporter of Manchester United and a user of cannabis.
He had a sister and two brothers.
His mother and father are now believed to be back living in Libya, and for a while he left the UK too but he is believed to have returned in the last few days.
Greater Manchester Police Chief Constable Ian Hopkins said Abedi had not been formally named by the coroner.
Abedi's family lived at more than one address in the city, including a property at Elsmore Road in the Fallowfield area that was raided by police.
Officers also carried out a search of a property in Whalley Range.
A 23-year-old man has been arrested in connection with the investigation.
Manchester is home to one of the largest Libyan communities in the UK and neighbours have talked about the family having a Libyan flag flying in its house at certain times of the year.
BBC home editor Mark Easton said the raided area was known to have been home to a number of Islamist extremists in recent years; some with links to Syria and Libya; some alive and some dead.