"That incident stirred up a sense of anger among young Libyans in Manchester and especially Salman, who clearly expressed his desire for revenge", he said.
The i newspaper writes that police say "significant " progress is being made in dismantling the network behind the bomber, as they took the unprecedented step of stopping the sharing of information about the atrocity with the Federal Bureau of Investigation following a succession of intelligence leaks.
His suspected killers are still on trial.
The 23-year-old singer also shared a link raising funds to support families of those killed and injured in the Manchester Arena attack.
Eighth person arrested in connection with deadly Manchester terror attack
Music fans were targeted at an Ariana Grande concert at Manchester Arena in the worst terrorist attack on British soil since the July 7 bombing in London in 2005.
In the days following the bombing, England's authorities are facing mounting questions about how these lapses affected, and allowed, Abedi to evade police and carry out his unspeakable act of terrorism.
On Wednesday, British police arrested a man near Manchester in connection with the terror attack, the deadliest in Britain since 2005, bringing the total number of people detained in the investigation to five. Nine men remain in custody for questioning, police said.
The UK terror threat level remains "critical", meaning another attack could be imminent and additional Army and armed police officers are patrolling major sites, including the transport network, across the UK.
In her first substantive comments since Monday's attack claimed by the Islamic State group, Grande hailed the compassionate spirit of her fans and vowed not to give in to divisions.
Campaigning in Britain's general election, set for June 8, is resuming after being suspended because of the bombing late Monday following an Ariana Grande concert.