Updated

An American woman has pleaded guilty to conspiracy to commit murder in a plot that envisioned the use of rifles and gas bombs to kill shoppers at a food court in a mall in Canada.

Lindsay Kantha Souvannarath of Geneva, Illinois, was one of three people involved in the plan to shoot shoppers at the Halifax Shopping Centre in Nova Scotia.

Chris Hansen, a spokeswoman for the public prosecution service, said Tuesday the plea came during a routine court appearance.

Souvannarath, 25, had plotted the attack with Randall Steven Shepherd, who entered a guilty plea last year to conspiracy to commit murder.

An agreed statement of facts said Shepherd and Souvannarath, along with a 19-year-old man found dead, had planned to attack the mall on Valentine's Day in 2015.