Health officials have identified two additional people who tested positive for E. coli and may be part of the recent outbreak traced to private gatherings held in the Fresno area.

Investigators are tracking down everyone who attended three private parties where tainted food might have been served.

Officials need to know what the people ate

The Fresno County Health Department and Fresno County Environmental Health are looking into whether the Meat Market is the source of the E. coli outbreak that has sickened as many as 20 people so far.

The grill at the popular Meat Market in north Fresno was shut down for about an hour while county health