BREAKING NEWS: Two Dead in Shooting at Glenn M. Anderson Federal Building in Long Beach CA

URGENT:  Two dead in shooting at Long Beach, Calif., federal building.  Unconfirmed reports state a U.S. Immigration and Customs Enforcement agent may have been shot on the 7th floor of the Glenn M. Anderson Federal Building. Stay tuned. Developing story.

UPDATE#1:  NBCLosAngeles is reporting three immigration officers were involved in a shootout in the Long Beach federal building and two of those officers were pronounced dead at the scene and a third sent to a nearby hospital. The shooter is believed to have opened fire on his supervisor over an unspecified dispute, law enforcement authorities told the Los Angeles Times.