On Friday police located a white Nissan Micra in a vehicle park of a block of apartments in the Rusholme area of Manchester that they believe could point to Abedi's whereabouts between May 18 and 22 in the lead-up to the bombing at the pop concert.
Proceeds from the One Love Manchester event will go towards supporting grieving families and victims of the bombing. People are seen here moving out of the arena.
There is a precautionary 100m cordon in place around the the Banff Road area in Rusholme and police are asking people to avoid the area.
"This means more to us than all the fantastic things people have done", Peter Mann, whose daughter Jaden was injured in the attack, told the BBC after Grande's visit.
"Manchester's strength and togetherness is an example to the world", he wrote in a book of condolence.
The attacker, 22-year-old Salman Abedi, reportedly met with members of the Katibat al-Battar al-Libi, during trips to Tripoli and Sabratha, Libya.
He spoke with 47-year-old police Constable Michael Buckley, who treated the wounded even as he frantically searched for his own child.
Six of the 17 people arrested for possible connections to the attack have been released, police said.
Nathaniel Barr, a terrorism analyst at Valens Global who is an expert in virtual plotters, said in similar Isil suicide bombings evidence has been found of communications between the attacker and an invisible plotter miles away from the scene.
"I knew my daughter was in there somewhere", he said.
The attack at Grande's concert last week killed 22 people and injured dozens of others, many of them teenagers.
Other images show her hugging children in their beds and posing with nurses gathered on the ward.