Chuck Hagel says people killed, wounded in 'terrible tragedy' at Fort Hood

Defence Secretary Chuck Hagel said on Wednesday that people had been killed and wounded in a "terrible tragedy" at Fort Hood in Texas, which was the scene of a mass shooting in 2009.

"It's a terrible tragedy. We know that. We know there are casualties, both people killed and injured," Hagel told a news conference in Honolulu, where he was meeting with Asian defense ministers.

"We don't have all the facts yet. We will get those. It's still under investigation," he added.