From Twitter. Trying to get confirmation elsewhere
BREAKING. Police have been called to Nakatomi Plaza, a high-rise office building in Century City, Los Angeles, California that houses the headquarters of the California branch of the Nakatomi Corporation, a Japanese company.
https://twitter.com/BrowneLawOffice/status/1342293001561911296
Lots of reports coming in now on Twitter. Some saying at least 30 hostages. Some calling it terrorists attacking a Christmas party.