A woman has pleaded guilty to making a series of hoax bomb threats at police stations across Sheffield.
Amanda Pinder, aged 33, admitted making several calls to police in April 2013.
The threats were made just days after the Boston Marathon bombing and at a time when Sheffield was hosting the world snooker championship.
Pinder of East Bank Road, Norfolk Park, Sheffield, admitted communicating false information at Sheffield Crown Court.
The case was adjourned and Pinder was told she will be sentenced on May 8.
Pinder was released on bail ahead of her next appearance at court.
At a previous hearing at Sheffield Magistrates’ Court prosecutors said Pinder made six telephone calls and sent one text to South Yorkshire Police between April 19 and 20 threatening to detonate bombs at police stations across the city.