Armed robbers attacked the Delhi-Bhagalpur Express in a Naxal-affected area in West Bengal's Malda division and looted valuables worth around Rs 3 lakh, the railways said Thursday.

The robbers used an alarm chain to stop the train near Dhanauri station in between Kiul and Jamalpur section and looted the passengers late Wednesday night, it said. A case was registered in this connection after 10 passengers lodged their complaints with the Government Railway Police (GRP) in Jamalpur, the railways said.