Chico State's President has suspended all sorority and fraternity activity on campus until further notice. The announcement came as President Paul Zingg met with Greek representatives Thursday at the Bell Memorial Union. CSU Spokesman Joe Wills says the action is based not just on the recent alcohol poisoning of 21 year old Mason Sumnicht, but follows a series of incidents that go back to last spring. He says all Greek groups will be eligible for reinstatement next spring. Wills adds the action will not affect other groups or organizations on campus.