By Selena Hill ( | First Posted: Jun 20, 2013 12:46 PM EDT

Facial recognition software was unable to identify the Boston Marathon bombers from these surveillance photos. (Photo : Reuters)

New York City Mayor Michael Bloomberg's anti-gun violence group made a big mistake during anti-gun violence rally on Tuesday causing a major uproar.

While reading out the names of victims of gun violence since the Sandy Hook Elementary School massacre in Newtown, Conn., someone from the Mayors Against Illegal Guns sponsored event also included the name of Boston Marathon bomber Tamerlan Tsarnaev. The event was held outside the New Hampshire State House in Concord. According to the Atlantic Wire, the rally was part of the group's "No More Names" bus tour, a 25-state and 100-day effort to reduce gun violence.

On Wednesday, Bloomberg's group was on damage control, releasing a statement calling the incident a "mistake" and explaining that Tsarnaev's name was called because they were reading from a list taken from that included him.

Mayors Against Illegal Guns confirmed that it had taken the names from a crowd-sourced list of gun victims on, which included Tsarnaev. WMUR-TV in Manchester, N.H., published a statement from the group, saying that it regretted naming the alleged Boston bomber.

"He was absolutely not a victim," Bloomberg's group said in a statement. "His name should have been deleted before the list was provided to a family member for reading and his name should never have been read. It was a mistake, it should not have happened and we sincerely apologize."

Nonetheless, critics like state Republican Chair Jennifer Horn claimed the incident shows that Bloomberg's gun group is "radical and out of touch with New Hampshire values." 

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