In November 2017, Islamic terrorist organisation ISIS threatened to attack the Hindu pilgrims who visit the Kumbh Mela and Thrissur Pooram. The 10-minute audio clip warned of a 2017 Las Vegas style attacks to be carried out by lone wolf attackers. The clip also called on the Mujahideen to use different tactics like poisoning the food, use trucks or at least try to derail a train. The terrorists had threatened to poison the water of the Ganges river.