Authorities are ruling out the possibility that tainted drugs killed a man following a San Francisco Bay area rave concert.
Daly City police Sgt. David Mackriss said Tuesday that overdoses from various potencies of Ecstasy likely contributed to 23-year-old Anthony Mata's death Sunday.
Six other people are in critical condition at area hospitals for suspected overdoses. Another two people are in stable condition.
They were among more than 16,000 people attending the "POP 2010" music festival Saturday at the Cow Palace in Daly City.
At least 75 people were arrested for possessing or selling drugs and about 800 Ecstasy pills and $5,000 in cash were confiscated at the event.