Police on Long Island are investigating the shootings at two separate house parties that left two people dead.
Nassau County police say one person was killed in Uniondale and one several miles away in Lakeview.
More than 100 people turned out at each of the parties on Sunday.
Nassau County Detective Lt. Kevin Smith told the Wall Street Journal that news of the party in Lakeview was sent to Facebook and Twitter accounts.
At the Uniondale event, organizers charged an entry fee, which Smith said created a problem because it opened it up to anyone.
Published at 10:47 AM EDT on Jun 14, 2010 | Updated at 9:32 PM EDT on Jun 23, 2010
Copyright Associated Press / NBC New York