Police failed to act on warnings about 'ticking time bomb'
UK security agencies had been warned multiple times that the Manchester bomber who murdered 22 people was extremely dangerous, but failed to arrest him.
Salman Abedi has been described as a "ticking time bomb" with suspected links to Islamic State.
It comes as neighbour has also released footage, filmed in July last year, of Abedi leaving his Manchester home dressed in hooded brown robe as he took the bins out to the street.
Police now believe that rented flat in central Manchester used by Abedi was a potential bomb factory, as they attempt to determine the full extent of Abedi's terror cell, that has seen eight people arrested.
Abedi was filmed taking out the bins in a brown robe by a suspicious neighbour.
Neighbours reportedly thought he was acting suspiciously at the time and claim that various large packages had been delivered to the house in the weeks leading up to the blast.
Abedi’s parents reportedly warned police he was "dangerous", but their attempts to persuade him to come to Libya failed.
The 22-year-old convinced his parents to allow him to travel to Saudi Arabia for a religious pilgrimage but is believed to have returned to the UK four days before the attack.
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“The father had all the passports with him and was holding them. But Salman said he wanted to do Umrah and that is why he needed to leave Libya,” Jamal Zubia, a leading figure in the Libyan community in Manchester told The Times.
The Manchester bomber, Salman Abedi (right), pictured on a Libyan beach. Source: Facebook
It’s since been revealed that 15 minutes before detonating a bomb packed with nuts and screws, Abedi phoned his mother, asking her to “forgive me”.
“He also called his mother and brother 15 minutes before the operation started,” a Libyan government spokesman said.
'He wanted revenge'
Libya arrested Abedi's father Ramadan and younger brother Hashem, who was also born in Britain, a relative and security sources said on Wednesday.
Ahmed bin Salem, a spokesman for the Deterrence Force, which supports Libya's UN-backed unity government, said Hashem Abedi was aware of his brother's attack plan and both were members of IS.
The relative said Salman had travelled to Manchester from Libya four days before the bombing.
"His father wanted his son to stay in Libya but Salman insisted on going to Manchester."
While the precise details of when and how Salman Abedi decided to turn to violent extremist remain unknown, his sister said he was loving, but driven by a desire for revenge.
Hashem, the brother of Salman, has also been arrested. Source: Facebook
"I think he saw children -- Muslim children -- dying everywhere, and wanted revenge. He saw the explosives America drops on children in Syria, and he wanted revenge," said Jomana Abedi, quoted by The Wall Street Journal.
Such anger was reportedly heightened when one of his friends, 18-year-old Abdul Wahab Hafidah, was murdered in the Moss Side area of Manchester a year ago.
"I remember Salman at his funeral vowing revenge," the family friend told the Journal.
Before carrying out the deadly attack at Manchester Arena, Abedi had joined Manchester's huge student population.
The University of Salford confirmed Abedi had studied there but a source told the Press Association news agency he dropped out two years into a business and management degree.
