California shooting motive not known yet, terror 'possible': Obama

Washington:  US President Barack Obama on Thursday said the motivation for a deadly shooting in California was not yet known, but a terror attack could not be ruled out.

"At this stage, we do not yet know why the terrible event occurred," Obama said. "We don't know at this point the extent of their plans. We do not know their motivations."

"It is possible that this was terrorist-related. But we don't know. It's also possible that this was workplace-related," the president said.