Ariana Grande's Barcelona show will go on, but London O2 concerts cancelled due to Manchester bombing

The artist is distraught by the attack, perpetrated by Salford University drop-out Salman Abedi, 22, who blew himself up with a device described as 'very sophisticated'.

She has called off her Dangerous Woman Tour dates in London's O2 arena, Belgium, Poland and Germany, but will resume on June 5 with her planned concert in Switzerland.

The cancellations are partly due to Ariana's own extreme distress, caused by her own terror as well as witnessing scenes of children and teenagers badly injured, killed and dismembered, and partly because she feels it is a 'mark of respect' towards Manchester to stop the tour for the moment.

Police have named the killer as the son of a Libyan couple who fled Colonel Gadafi's régime in the 1990s and settled in London, and then Manchester.

Abedi's parents moved back to Libya after he and other members of the huge Libyan and second-generation community went to the country to fight the dictatorship 'out of loyalty and a sense of the greater good' following the Arab Spring of 2011.

The suicide bomber's sister Jumala, 20, lives with her parents in Tripoli and says she believes her brother was 'seeking revenge' after seeing footage of children killed by US air-strikes in Syria, and after a close friend of Libyan descent was stabbed and then run over in a racially-motivated murder.

Jumala says the whole family had been concerned Salman was 'turning violent', and spokespersons from the Libyan community in Manchester say they had warned Secret Services numerous times about the presence of 'radicalisation' in their city.

Abedi's father and at least one of his brothers have been arrested in Libya by the militia working for the UN-backed government, although their charges are not yet known.