The condition of three British nationals injured following the derailment of Shimla-Kalka toy train is said to be critical, some reports said citing hospital sources on Sunday.

PTI reported that out of the 13 injured, 10 British nationals were released on Sunday, while three were still in the intensive care unit (ICU).

Two British citizens were killed after three carriages of the toy train carrying a group of 37 derailed on Saturday afternoon near Parwanoo between Kalka and Taksal stations.

A statement issued by Max Hospital in Mohali stated that Halder Calder (58), Ian Calder (60), Paul Carr (44), Stephen Frasher (63), Marion Homes (64), Judic (67), Richirj (72), Robert (65), John (74) and Christine Fraser (62) were discharged after first aid.

However, condition of three patients--Andrew Summerhayes (40), George Bertram (50) and Diana Logan (40)--remains serious, hospital sources said. While two of them had sustained head injuries, another had suffered a fracture, Head of Emergency Services of Max Hospital Dr Sumit Arya said.

Summerhayes, who suffered a head injury, was under constant observation, while Bertram has a lacerated wound on the scalp, Dr Arya said. Logan had an avulsion of the scalp which has been sutured by the plastic surgeon, he added.

Local officials are currently working with the British embassy to fly back the bodies of the two dead British women identified as Loraine Toner and Joan Nickolas, both 60. The relatives of the dead and the seriously injured are on their way to India from the UK, it was reported.

A total of 36 passengers along with a tour manager were on the train when the accident took place, The Telegraph reported. All 36 tourists on board the toy train were UK nationals.