Pepper sprayed at fans during Nicki Minaj's concert

Rapper Nicki Minaj's concert in Concord, California had moments of panic when a man started spraying pepper at the crowd during her last song.
The incident took place last week, reported TMZ.
A video clip from the concert shows several fans arguing about seating arrangements.
A concertgoer is then shown opening a canister and spraying pepper at others.