As reported by TV3, many members of the Manchester City squad were also present at the American star's concert with their families, but they were also uninjured.
The two explosions happened at the Manchester Arena, 200 metres from the Spanish manager's house.
As of now, the tragic attack has taken the lives of 22 people and injured 59 others, due to the suicide bombing that took place as the concert drew to a close.
Guardiola took to Twitter to express his hurt, 'shocked' by the events that were carried out in Manchester, which have distressed the entire world.
Shocked. Can't believe what happened last night. My deepest condolences to the families and friends of the victims.#Ilovemanchester
— PepTeam (@PepTeam) 23 May 2017