PHOENIX -- Guns from the failed "Fast and Furious" operation are being tied to more violence south of the border.
The Spanish language network Univision has tied weapons from the ATF's gun operation to a massacre at a birthday party in January 2010.
In that shooting, a group of hit men opened fire on a gathering of nearly 60 high school and college students, killing 14 and wounding a dozen more.
Serial numbers from guns at the scene and another mass shooting in 2009 match the guns on the list of weapons turned over to Congress.
The report identifies nearly 60 previously unreported weapons found at kidnapping and murder scenes also linked to Fast and Furious.
The 2009 operation was designed to nab members of the big drug cartels and illegal weapons traffickers, but investigators lost track of the weapons and an untold number made it into Mexico and then were used in crimes.
Two of the weapons found at U.S. Border Patrol agent Brian Terry's murder scene were traced back to Fast and Furious.