"The barbaric attack in Manchester and the massacre of innocent young lives underscores the depth of the evil we face and the urgent need for us to join forces to absolutely and totally defeat it," he added.

He then moved onto the attack in Egypt on Friday, claimed by Isis, where more than 20 Coptic Christians were killed.

"These murderous attacks steel our resolve. Together civilised nations will crush the terrorists, block their funding, strip them of their territory and drive them out of this Earth," he said.