ST. CLOUD — St. Cloud police said a missing college student may have fallen off a railroad bridge over the Mississippi River.

Authorities obtained additional surveillance video that shows 21-year-old St. Cloud State University student Jesse Aaron Dady walking onto the bridge. Another video shows Dady moving across the bridge until he is no longer seen about one-third of the way across and may have fallen.

Police said Dady always was alone on the bridge.

Dady was last seen in downtown St. Cloud early Saturday. Searches of the river have turned up no trace of him.

Police do not suspect foul play.