She said the security services had foiled 18 plots since 2013.
"Why was there no outrage for the killing of an Arab and a Muslim in such a cruel way?" she asked, speaking on condition anonymity over fears for her own safety.
British counter-terror chief Mark Rowley said Friday police had captured "a large part of the network" linked to the bombing, confirming they were holding "some of the key players" but admitting there was still some work to do.
Fourteen locations are still being searched in connection with the attack and 11 men remain in custody on suspicion of terror offences. His older brother, 23-year-old Ismail, was arrested by Manchester police on Tuesday. But leaks from the investigation were creating a trans-Atlantic diplomatic mess. The disclosure infuriated British officials, and Prime Minister Theresa May brought up the leaks with President Donald Trump at the North Atlantic Treaty Organisation summit Thursday.
"The alleged leaks coming out of government agencies are deeply troubling", Trump said in a prepared statement.
Forensic pictures leaked to the New York Times show the charred remains of the Karrimor backpack the terrorist used to hide the deadly explosive.More news: Ransomware WannaCry Infected Almost Only Windows 7 PCs
The New York Times defended its publication of the photos saying they were neither graphic nor disrespectful to the victims.
"Even if the families knew about their sons' ideologies or affiliations, they wouldn't talk but keep it to themselves", he said.
Meanwhile, the investigation into the blast widened. They were exploring potential ties to Abdalraouf Abdallah, a Libyan jailed in the United Kingdom for terror offenses, and to Raphael Hostey, an Islamic State recruiter killed in Syria.
Since the attack, Abedi's older brother, Ismail, has been arrested in Britain, while his younger brother, Hashem, and father have been detained in Libya.
Experts have examined the detonator switch found near the body of sick Salman Abedi and it's believed the bomb may have had a remote switch.
"The point you need to understand about the war is that the revolution wasn't an Islamic revolution", said Mahmoud. "And he gave a good stare, a threatening stare into the imam's eyes".
Manchester's Libyan community includes many exiled or forced to flee by the former leader for their political views.More news: Noren shoots 10-under 62, wins BMW PGA Championship
That assertion clashed with information provided to Libyan authorities by Abedi's brother Hashim and his mother, who was also brought in for questioning in Tripoli.
"He was giving farewell", bin Salem said. "They are unjust to the Arabs".
Officials in Libya have also claimed that the killer only left Libya for England four days before the bombing. His father has said Abedi was in Libya until earlier this month and had told family he had planned to go to Saudi Arabia on a pilgrimage.
Ammar said that Salman Abedi was distraught after a friend, Abdul Wahab Hafidah, was killed in May 2016 in what authorities took to be an act of gang violence.
Mancunians, as Manchester's residents are known, filled St. Ann's Square in the city center for a memorial service.
Queen Elizabeth II visited victims of the attack at Royal Manchester Children's Hospital, telling 14-year-old Evie Mills and her parents: "It's awful. Very wicked, to target that sort of thing". Grande tweeted that she was "broken" after the bombing.
"Compared to other people I'm quite lucky really", she said.More news: Former Greek PM Papademos treated for minor injuries from letter bomb
Theresa May's Conservatives are well ahead in the opinion polls, but before the attack the lead had been halved in some polls and she was forced to backtrack on a plan to force elderly people to pay more for their social care.
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