A suspicious bag, which was found at the gate of Haridwar Railway Station, created panic on Thursday, reports said. A police investigation team and bomb disposal squad have reached the spot.

Four persons with suspected ISIS links were arrested from Manglour in Uttarakhand and according to Delhi Police the terrorists had plans to target the Ardh Kumbh Mela in Haridwar and some strategic locations in Delhi and NCR.

"The four suspects were tracked down with inputs from a central intelligence agency. They had planned to carry out terror attacks at the Ardh Kumbh mela, trains heading towards Haridwar passing through Roorkie and some strategic locations in Delhi," Special Commissioner of Police (Special Cell) Arvind Deep said.

The suspects have been identified as Akhlaq ur-Rehman, Mohammed Osama, Mohammed Azim Shah and Mehroz.