The gunman who killed three people who work for a California programme that treats veterans for post-traumatic stress disorder was kicked out of the therapy, a relative of one victim said.

Update 7.12pm: A man ploughed his car into a group of pedestrians at Ohio State University and then began stabbing people with a butcher knife before he was shot and killed by an officer, campus police said.

In the US, a former convict has shot two people dead and injured three during a rampage across a number of towns in northern Maine.