Billie Joe Armstrong wants fans to know he and his Green Day bandmates are "heartbroken" over the tragic death of an acrobat at their Madrid concert.
Armstrong, 45, took to Facebook to explain that Green Day's members were unaware aerial artist Pedro Aunion Monroy plunged to his death shorty before the legendary punk band took the stage at Madrid's Mad Cool Festival on Friday.
"We are so sad for Pedro and his family and we pray for them in this time of grief. I can't imagine how much suffering the friends and family are going through," the former "Voice" mentor wrote.
Monroy, 42, was entertaining the crowd in between musical sets at the gigantic festival. While performing inside a large box held in the air by a crane, the London-based acrobat's equipment malfunctioned. Thousands of concertgoers watched as Monroy plummeted 100 feet. He died shortly after emergency workers arrived.
After a brief security delay, the band took the stage a half hour later, knowing nothing about the fatal fall.
"Green Day did not hear about the accident until after our show was over," Armstrong explained, adding that band members were unaware an acrobat had performed at all. "These festivals are huge. There are so many things happening at the same time."
Green Day gave it their all onstage for two and a half hours, said the singer.
"This was to be the last show of our European tour and we were all so excited to play our hearts out one last time," he said. "Everything seemed normal. The crowd and fans had a good time."
However, once offstage, "we were told the shocking news about Pedro. All of us were in disbelief," said Armstrong.
Had the band known about the horrific accident, said Armstrong, "we most likely would not have played at all."
More Pop Culture videos
How the winner of the MLB All-Star giveaway spent the weekend in DC!
A board game that tests your sense of smell? KLG and Hoda take a whiff
KLG and Hoda viewers submit hilarious road signs!
Savannah Guthrie sits down with Lin-Manuel Miranda in exclusive TODAY interview
"We are not heartless people. The safety and well being at any of our concerts absolutely comes first. What happened to Pedro is unthinkable," said Armstrong.
"Once again we are heartbroken for his friends and family and we are also shocked and heartbroken for anyone that had to witness this tragedy."