At least 42 people were feared killed in a suspected IED blast in the Delhi-Attari Special train near Deewana in Panipat, about 80 kms from Chandigarh, around midnight.
The dead included some Pakistanis, top police officials in Chandigarh said. Two CRPF jawans were also said to be missing.
The train to Attari carries passengers to Pakistan for cross over at Wagah border.
Several people were injured in the suspected blast which occured at around 11.55 pm on Sunday night. Two bogies of he train caught fire in the explosion and the toll could go up.
The injured include a constable from Amritsar and at least eight Pakistanis, railway sources said.