Indianapolis police say the investigation is ongoing. The department posted on Twitter that there was an “unverified threat to the artist,” but no immediate threat to public safety.

Bankers Life Fieldhouse said in a statement the show was postponed due to “circumstances beyond anyone’s control.” The concert has been rescheduled for Sept. 11.

FILE – In this June 16, 2019 file photo, Cardi B performs at the Bonnaroo Music and Arts Festival in Manchester, Tenn. Cardi B postponed an Indianapolis concert following what police described as an unverified threat to the Grammy-winning artist. A post on her Twitter account offered an apology to fans about Tuesday, July 30 planned show at Bankers Life Fieldhouse, saying: “My safety and your safety first.” (Photo by Amy Harris/Invision/AP)

Cardi B fans appear outside Banker’s Life Fieldhouse where the rapper’s concert was postponed in Indianapolis, Tuesday, July 30, 2019. The concert was postponed following what police described as an unverified threat to the Grammy-winning artist. It has been rescheduled for Sept. 11. (Jenna Watson/The Indianapolis Star via AP)

Cardi B fans appear outside Banker’s Life Fieldhouse where the rapper’s concert was postponed in Indianapolis, Tuesday, July 30, 2019. The concert was postponed following what police described as an unverified threat to the Grammy-winning artist. It has been rescheduled for Sept. 11. (Jenna Watson/The Indianapolis Star via AP)

Cardi B fans appear outside Banker’s Life Fieldhouse where the rapper’s concert was postponed in Indianapolis, Tuesday, July 30, 2019. The concert was postponed following what police described as an unverified threat to the Grammy-winning artist. It has been rescheduled for Sept. 11. (Jenna Watson/The Indianapolis Star via AP)