Rapper 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's planned show at Bankers Life Fieldhouse, saying: "My safety and your safety first."
The post said Cardi B, whose real name is Belcalis Almanzar, had earlier rehearsed at the arena. Concertgoers in line to get in Tuesday night were told of the postponement by security.
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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" and it has been rescheduled for Sept. 11.