NEW DELHI: At least nine people were killed and several others were injured on Sunday after a passenger train collided with another passenger train near Alamanda-Kankatapalli in Vizianagaram district in Andhra Pradesh.Four coaches derailed after the train that was travelling along with passengers from Vizianagaram to Raigad hit a passenger train travelling on the same route from Vishakapatnam to Palasa.The officials are carrying out rescue operation at the spot.East Coast Railway (ECoR) said a human error, overshooting of the signal by Visakhapatnam- Rayagada passenger train could have resulted...