Cardi B’s concert scheduled to take place this evening in Indianapolis, Indiana, was suddenly shelved because of what police described as an “unverified threat” against the rapper.

“This evening, there was a scheduled concert at Bankers Life. We were notified of an unverified threat to the artist and the artist canceled this evening’s concert – there is no immediate threat to public safety, this is not an active incident. Ongoing investigation,” the Indianapolis Metropolitan Police Department said in a statement on Twitter.

This evening, there was a scheduled concert at Bankers Life. We were notified of an unverified threat to the artist and the artist canceled this evening’s concert – there is no immediate threat to public safety, this not an active incident. Ongoing investigation #IMPDNow — IMPD (@IMPDnews) July 31, 2019

The Grammy-winning rapper took to Twitter to apologize to fans. She shared a message, along with a video from the stage, saying she had been rehearsing just before the concert was scrapped.

“Dear Indiana people I’m so sorry for today. I will like to let you know I was at the venue I was even rehearsing a new move I been excited to do on my show,” Cardi B tweeted. “Unfortunately there was a security threat that is currently under investigation right now. My safety and your safety first.”

Dear Indiana people I’m so sorry for today .I will like to let you know I was at the venue I was even rehearsing a new move I been excited to do on my show. Unfortunately there was a security threat that is currently under investigation right now. My safety and your safety first. pic.twitter.com/4glELemzYY — iamcardib (@iamcardib) July 31, 2019

The hip-hop star had been scheduled to perform along with special guests, rappers Kevin Gates and Saweetie.

A statement from Bankers Life Field House said the show would be rescheduled for September 11, and all tickets for the original date will be honored.