Grande was playing her sixth European date on her Dangerous Woman tour when a suicide bomber attacked concert-goers as they were leaving her concert at Manchester Arena, killing 22 individuals and injuring at least 59.
People look over floral tributes in St. Ann's Square for the people who lost their lives during the Manchester terror attack in central Manchester, Britain, 24 May 2017.
Ariana Grande has postponed her tour through June 5 following the terrorist attack on her concert in Manchester, England on Monday.
But after of the bomber's identity and details of the probe were leaked, the intelligence-sharing relationship between close allies London and Washington was left rocking.
A family friend said that the bomber, whose father and two brothers have been arrested in the days after the attack, was also outraged at the death of his friend, which he viewed as a hate crime.
"When that trust is breached it undermines these relationships, and undermines our investigations and the confidence of victims, witnesses and their families". His brother Hashem Abedi was arrested in Tripoli on Wednesday and admitted to being a member of ISIS, according to a Libyan militia. Former Libyan official Abdel-Basit Haroun told the news agency on Wednesday that the elder Abedi was a member of the Libyan Islamic Fighting group in the 1990s, which had links to al-Qaeda.
Salman Abedi was a loner who loved soccer, smoked pot and expressed sympathy with suicide attackers, according to reports that emerged Wednesday.More news: Pope Francis Met With Donald Trump
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Another possible link under investigation is whether Abedi had ties to Raphael Hostey, a jihadist recruiter who was killed in Syria, the officials said.
Another man has also been arrested in the city over the tragedy, bringing the total number of men in custody to eight.
Home Secretary Amber Rudd, who said Abedi had been known to British security officials, complained Wednesday about USA officials leaking sensitive information about Abedi to the media, saying that could hinder Britain's security services and police. Manchester police have arrested six men in connection with the attack, including the brother of Salman Abedi.
Elders at the south Manchester mosque believed to have been frequented by Abedi insisted that his actions were wholly alien to their preaching, and pointed the finger at online radicalisation.
The issue of the leaks will be raised at the very highest level when the Prime Minister and the US President will meet to discuss, amongst other things, counter-terrorism.
Islamic State claimed responsibility, Britain's official terror alert was raised to "critical", and hundreds of soldiers were deployed on Wednesday to guard key London sites, including London's Houses of Parliament.
"In some of my conversations that I've had with people who are following this very closely, the feeling is that they were aware of the bomber, but they didn't think that he had the ability to pull off something like this, something of such sophistication and something so effective and deadly".
May was to hold a meeting of Britain's emergency committee on Thursday before heading to Brussels.