New York delegate Julia Rodriguez told a reporter on camera that if she bumped into Republican presidential nominee Mitt Romney, she "would like to kill him," leading the U.S. Secret Service to investigate the threat.

"We are aware of it and will take the appropriate follow-up," George Ogilvie, spokesman for U.S. Secret Service, told ABC News in a statement Thursday.

Video surfaced Wednesday of an elderly woman identifying herself as New York delegate Julia Rodriguez at the Democratic National Convention in Charlotte, N.C. In the clip she said, "If I see him," meaning Romney, "I would like to kill him."

Romney, whose Secret Service code name is "Javelin," has had Secret Service protection since late January.

In the video, Rodriguez says that she is originally from Puerto Rico but has lived in New York for 40 years. According to a list of delegates posted at Democrats.org, Rodriguez is from the Bronx.

She was also photographed Wednesday by the Associated Press holding a Puerto Rican flag in a photo booth at the convention in Charlotte.

Attempts to reach the New York State Democratic Party were unsuccessful, and the headquarters' voicemail was not accepting new messages.