Barack Obama: California shooting possibly related to terrorism

President Barack Obama has said it is possible the mass shooting in California was related to terrorism, but that authorities still do not know.

He added that it is possible it was workplace-related or that there were mixed motives.

Mr Obama was speaking in the Oval Office to assure Americans that authorities will get to the bottom of what happened.

He also called for people to wait for facts before making judgments.

Mr Obama said many Americans feel there is nothing they can do about mass violence. But he added: "We all have a part to play."

Mr Obama said the nation must make it harder to carry out violence. But he acknowledged the threat cannot be eliminated completely.

He said it will be important for all Americans, including state legislators, to see what they can do.

Investigators on Thursday were trying to learn why Syed Rizwan Farook and his wife or fiancee, Tashfeen Malik, 27, went on the rampage at the Inland Regional Centre.

The 28-year-old county restaurant inspector and Malik killed 14 people and seriously wounded more than a dozen others in an attack on Wednesday at the social service centre for the disabled before they were gunned down in an SUV a few miles away in...