Federal prosecutors say more charges and defendants are expected to be added to a sweeping organized crime and public corruption case centered in San Francisco's Chinatown.

They the additional charges and defendants will be added in the next 90 days.  The new round will likely contain racketeering charges. Prosecutors didn't identify who would receive those charges.

Racketeering charges carry maximum penalties of 20 years in prison and hefty fines and civil penalties, including seizure of property.  Racketeering counts enable prosecutors to charge leaders of gangs with crimes they ordered others to carry out.

Some 29 people, including suspended state Sen. Leland Yee, have been charged in the case. Yee has pleaded not guilty to bribery and gun charges.