Manchester suicide bomber Salman Abedi is pictured on the cover of UK paper The Sun. Picture: The Sun

Salman Abedi’s younger brother, Hashim Ramadan Abu Qassem al-Abedi - arrested in Libya following the bombing - knew of his brother’s movements and about the plot, CNN reported, quoting a Libyan TV news source.

Despite talking to his brother Hashim told his Libyan questioners that he did not know details about where and when the blast would be, CNN reported.

Meanwhile, British Security Minister Ben Wallace told the US network that UK security services were trying to contain the network believed to have aided Abedi’s devastating attack, which slaughter 22 and injured dozens more on Monday.

“We are following up on the network, rolling it up, trying to contain it. As you’ve seen from the number of arrests, we are on the right track to try to contain it,” Mr Wallace said.

Worshippers attend Friday Prayers at Manchester Central Park Mosque in Manchester dedicated to the victims of the May 22 terror attack. Picture: AFPSource:AFP

Also on Friday, US Secretary of State Rex Tillerson said his government took full responsibility for leaks of the British police investigation into the bombing.

Appearing alongside British foreign secretary Boris Johnson in London on Friday, Mr Tillerson said “all across America, hearts are broken” at news of the attack on people attending a concert by US pop singer Ariana Grande.

British police briefly suspended intelligence sharing with the US on Thursday after private details of their investigation repeatedly appeared in American media.

“We take full responsibility for that and we obviously regret that that happened,” Mr Tillerson said.

“With respect to the release of information inappropriately ... certainly we condemn that.”

British Foreign Secretary Boris Johnson and US secretary of state Rex Tillerson attend a joint press conference in London on Friday. Picture: Adrian Dennis/Getty ImagesSource:Getty Images

BOMBER STOCKPILING MATERIALS FOR A YEAR

It also emerged on Friday that al-Abedi had been planning the attack for over a year, stockpiling nails and screws from DIY stores bought using a dormant bank account, it has emerged.

The Sun reports Salman Abedi, 22, opened an account a year ago which lay empty until he used it to buy shrapnel for the bomb he used to slaughter 22 and injure dozens more on Monday.

To avoid suspicion, the bomber made at least two separate trips to B&Q and Screwfix in Manchester before heading to Libya in April, The Times reports.

On Thursday it was reported a bomb-making factory had been found inside Abedi’s home in Fallowfield, South Manchester.

Salman Abedi reportedly ‘plotted for a year’ before the Manchester attack. Picture: AFP/FacebookSource:AFP

He is believed to have assembled the device at a city-centre flat rented on Airbnb on Monday before carrying out the atrocity.

On raiding the plush rental flat, cops discovered a huge stock of chemicals and bomb-making components.

The quantities have led to fears at least two other bombs similar to that used on Monday could have been built.

Family and friends paid tribute to their loved ones as the last of the victims was named yesterday, while and cops continued the hunt for other members of the terror cell.

It is believed Abedi may have been given a crucial component for his device at a German airport en route to his terror mission.

Abedi flew to the city from Libyan capital Tripoli — via Istanbul — four days before the atrocity in Manchester.

An image that appears to show Manchester bomber Salman Abedi outside his home in July 2016. Picture: Sky News via APSource:AP

EXPLOSIVE HAD BEEN USED BEFORE

The explosive used in the bomb which killed 22 people in Manchester is the same as that used in the terror attacks in Paris and Brussels, it has been revealed.

News that the explosive known as TATP was used to trigger Monday night’s bombing attack at the Manchester Arena further heightens concerns that British-born suicide bomber Salman Abedi, 22, was acting as part of an international terror cell.

A backpack, believed to be the Manchester bomber's, is destroyed. Picture: SuppliedSource:Supplied

The potential detonator, which was found in Manchester bomber Salman Abedi's left hand. Picture: SuppliedSource:Supplied

A further two people were yesterday taken in by Geater Manchester Police for questioning, bringing to 10 the number of people arrested over the attack.

It came after British Prime Minister Theresa May used a NATO gathering to blast US President Donald Trump over information leaks to US media, which President Trump conceded were “deeply troubling”.

U.S. President Donald Trump jokes with British Prime Minister Theresa May at a NATO gathering. Picture: APSource:AP

It was also revealed yesterday that Abedi flew via Dusseldorf airport in Germany and Istanbul and Ankara in Turkey when he returned from the Libyan capital in Tripoli to his home city of Manchester on May 18, four days before he targeted a pop concert by Ariana Grande, killing 22 people and injuring 119 more when he triggered a nail bomb hidden in a backpack.

Republican Congressman Mike McCaul, who chairs the US homeland security committee, said yesterday the bombmakers may have had foreign training due to the level of sophistication involved in its assembly.

Olivia Campbell's mother Charlotte Campbell and stepfather Paul Hodgson pay tribute to her and other victims of the explosion. Picture: APSource:AP

He said the explosive used was TATP, or triacetone triperoxide, which was used in the July 7, 2005 attacks in London, in the Paris attacks on the Bataclan Theatre in November 2015 and the Brussels airport and metro bombings which killed 31 in March last year.

“We’re not dealing with a lone wolf situation,’’ Congressman McCaul said.

Authorities are investigating whether Abedi was linked to the so-called Man in the Hat, Mohamed Abrini, a Belgium extremist accused of masterminding the Paris and Belgium attacks, who visited Manchester for fundraising and took photographs of landmarks in 2015.

As Manchester continues to mourn the victims of Monday’s night’s appalling attack, Abedi’s two brothers, Ismail, 23, and Hashem, 20, remained in police detention, along with their father Ramadan.

Ramadan and Hashem were detained in Libya on Wednesday while Ismail was arrested by police in south Manchester.

Eight people have now been detained in the UK and a further two in Libya, but other than the Abedi foursome, their identities are not known.

Police detained a man at a flat in Manchester. Picture: CatersSource:Supplied

Officers also evacuated people from an area in Wigan, a town in Greater Manchester, as they searched a house in connection with their investigation.

Greater Manchester Police chief constable Ian Hopkins said searches would continue over the next few days.

“I want to reassure people that the arrests that we have made are significant, and initial searches of premises have revealed items that we believe are very important to the investigation,’’ he said.

UK authorities have said they knew of Salman Abedi as a peripheral figure who was not considered high-risk, but it has since been revealed they failed to act on up to five tip-offs about him, and multiple international security figures have revealed they were aware of him.

The French have said he underwent terrorism training in Syria, and Scotland Yard has reportedly confirmed this to German authorities, saying he underwent paramilitary training in Syria.

The UK remains on its highest terror alert — critical — and police shut down Westminster Bridge in London on Thursday night after an abandoned car triggered a bomb scare.

Queen Elizabeth yesterday visited survivors in hospital in Manchester, while the nation came to a halt at 11am to observe a minute’s silence for the victims.

All 22 of the dead have now been identified, ranging in age from eight years to 54 years.

Reflecting Grande’s fan base, seventeen of the victims are female and five are male, while nine of the victims are teenagers and little girls aged 18 years or younger.

Olivia Campbell, 15, was identified by her mother as one of the 22 victims of the suicide bombing. Picture: FacebookSource:Facebook

Eight-year-old Saffie Roussos was also killed in the blast. Picture: Adam J. Brown/FacebookSource:Facebook

A sea of flowers, teddy-bears, balloons and posters has emerged around Manchester as police began to dismantle the road blocks, from Albert Square and St Ann’s Square in the city to the edges of the arena and the Victoria Station, which remain closed.

President Trump, who at the NATO summit in Brussels vowed to continue to war against Islamic State, said leaks to US media about the Manchester suicide bombing would be investigated by the Justice Department and other agencies.

An irate May said the countries’ partnership on defence and security was built on trust. But “part of that trust is knowing that intelligence can be shared confidently,” she said.