this train derails on smbx - bhbt section. it was raining heavily in Jammu so a tree fell down on the track.the engine of hemkunt exp. hits the tree on a curve and fell down of the track. as there is single track between samba and basantar block hut, there is no movement of trains from morning. trains are standing at various stations. engine of shalimar exp. was send and it brings the rake of hemkunt exp. to samba