Fatal shooting at US church camp

One person has been killed and four injured in a shooting at a Korean Christian retreat in California, officials say.

The gunman was believed to be one of the people injured at a campground in Temecula, about 85 miles (135km) southeast of Los Angeles, police said.

At least two of the victims were critically injured, and the motive for the attack was unclear.

Police arrived at the campground after reports that a man had shot his wife.

Riverside County Sheriff's spokesman Dennis Guttierez told the Associated Press news agency: "We have some nuns that are very distraught."

Language differences were making the police investigation difficult, he added.