Nine coaches and the engine of the 15666 BG Express derailed at Ajuri station near Morigaon in central Assam early today and over 50 passengers were injured, police said.The coaches of the Dimapur-Kamakhya train jumped the tracks but toppled down near Jagiroad in Morigaon district at 0205 am, they said.Seventeen passengers were seriously injured and shifted to Gauhati Medical College Hospital, police said.Rest of the passengers were reported to have received minor injuries and were released after receiving first aid in Morigaon Civil Hospital, Northeast Frontier Railway sources said.Senior railway officials have rushed to the site and rescue operations are on.

Helpline phone numbers have been activated and they are at Dimapur 03862-228404, Lumding 03674-264848/49/50 and Guwahati 0361-2731621/22/23, sources said.