Nine people have been killed in a mass shooting in Dayton, Ohio, police say, adding that the assailant was also shot dead by responding officers.
Reports that Orlando gunman Omar Mateen had been a regular at the gay nightclub he attacked and used gay dating apps have led to speculation that he was motivated by internalised homophobia. But what is it, and could it have anything to do with the worst shooting in recent US history?
Republican Donald Trump says he will like people on terror watch lists to be prevented from buying guns, in the wake of the Orlando shootings.
A US-born Muslim who along with his wife gunned down 14 people in California may have been radicalized and had been in contact with known terrorism suspects, news reports say.
