Welsh rock band Pretty Vicious from Merthyr Tydfil were in lockdown on Friday night after playing a gig just a mile away from the Bataclan music venue where at least 127 people were killed.
They had been performing as part of Festival Les in Rocks when the attacks happened, but didn't realise until after the show.
The band were then forced to quickly load up their van and walk around 300 yards to their hotel, where they locked themselves in for the evening.
The band's manager described a 'carnival' atmosphere before the gig - turning completely different after.
Speaking to ITV News he also described hearing sirens in the background, and feeling 'shock and disbelief'.
The band are now heading back to the UK and have tweeted a message of thanks to their fans and supporters.