S Club were forced to evacuate their concert on Monday night and furious fans later claimed that security 'blocked the exits' of the venue.
The gig was plunged into darkness during the performance at the rescheduled event, which took place at the M&S Bank Arena in Liverpool.
Fans were allowed to reenter the arena after officials decided that it was safe to do so, after it was claimed a fire alarm had been set off.
Taking to social media after the evacuation, gig-goers claimed that the fire exits were 'blocked' by security - and organisers have now set the record straight.