there's been a terrible accident to report to you that comes to us from canada. a passenger train there actually shearing off the front of a double-decker city bus in the capital city of ottawa. this happened this morning, and police say at least five people right now are confirmed to have been killed in this accident. cnn's paula newton is live on the scene. she joins us via telephone. paula, can you update on what just sounds like a tragedtraged >> reporter: it is a tragedy. people here still quite shaken, ashleigh. what happened was people were waiting on the platform to board a train that was bound for downtown ottawa to downtown toronto. they heard a loud thud, an incredibly loud screech, they said. you could hear the metal. and then plumes of black smoke. what seems to have happened is