Alwaght- Some members of Manchester suicide attack network could still be at large, British interior minister Amber Rudd said on Sunday.
Amber Rudd said "potentially" other members of Abedi's group could still be out there and "we can't be entirely sure that it is closed".
Police have said they have arrested a large part of the network behind the bombing, which killed 22 people at a concert hall, and two more men were arrested on Saturday, 11 people arrested altogether.
Prime Minister Theresa May said developments in the investigation into the bombing meant intelligence experts had decided to lower the threat level from its highest rating "critical", meaning an attack could be imminent, to "severe".
Early May, British media reports indicated that hundreds of ISIS terrorists are returning to the country from Syria, with the country's security forces saying they are unable to control the returnees.
Sources say the influx of ISIS is stretching the UK's security services to breaking point, with up to 30 officers required to provide 24-hour monitoring of just one suspect.
A few days before the Manchester attack last Monday, the UN Security Council's counterterrorism agency had warned that a wave of “dangerous and disillusioned” ISIS terrorists fleeing defeat in Syria and Iraq earlier this year might hit targets in Europe.
On Friday Britain’s opposition leader connected terrorist attacks at home with Britain’s failed wars abroad.
Addressing a press conference in London, Corbyn called for a change in how the UK operates in the world and handles domestic security.
He reiterated his longstanding view that engaging in wars like those in Iraq and Libya increase the threat of terrorist acts occurring at home.
