UPDATE (9:40 a.m. ET): One person is confirmed dead. Five others are wounded. (NBC News)
A gunman opened fire on board a Greyhound bus in California early this morning, wounding as many as six people.
Police say the suspect, who was a passenger on the bus that was traveling from Los Angeles to Northern California, pulled out a gun and shot six fellow passengers. The condition of the victims is unknown. The gunman was taken into custody and the shooting is under investigation. This story is developing. (CBS News)