After a mass shooting Sunday night in Las Vegas, Jennifer Lopez has postponed the next three dates of her show “Jennifer Lopez: All I Have” — which were set to take place at the Planet Hollywood Resort & Casino in the city — out of respect for the victims of the tragedy and their families.

Her performances were originally scheduled for Oct. 4, 6, and 7. A statement from Lopez says that ticket holders on those dates can expect to be contacted by Ticketmaster and the Axis box office to issue refunds or exchanges for any other on-sale performance of “Jennifer Lopez: All I Have” from Feb. 21 through June 9, 2018.

“Jennifer is heartbroken that such a senseless tragedy occurred,” reads the statement. “Her thoughts and prayers are with the victims and their families.”

Cirque du Soleil canceled its Monday night show with Blue Man Group out of respect for the victims of the attack. A spokesperson for Caesars Palace confirmed that all shows scheduled for Monday night at the venue were canceled as well.

This comes after a gunman opened fire on the Route 91 Harvest music festival at the Mandalay Bay Hotel & Casino in Las Vegas Sunday night, killing at least 59 and wounding over 500 others in the deadliest mass shooting in U.S. history by a single gunman. Stephen Maddock, 64, was named as the gunman by Las Vegas Metropolitan Police and died by his own hand in his hotel room on the 32nd floor of the hotel.

The shooting broke out at the end of a Jason Aldean set, with some witnesses reporting that they had heard possibly hundreds of shots and saw at least one officer down. Videos posted to social media show concertgoers sheltering in place as gunshots are heard ringing throughout the area.

Singer Jake Owen, who performed earlier and had joined Aldean on stage, told CNN: “This is not an exaggeration: This shooting was going on for at least 10 minutes. I mean, it was nonstop.”

Aldean called for prayers for the victims, saying on Instagram that “tonight has been beyond horrific … It hurts my heart that this would happen to anyone who was just coming out to enjoy what should have been a fun night.”