WOBURN, Mass. - A Massachusetts woman says her brother was among the Americans killed in an attack on the U.S. Consulate in Libya.

Kate Quigley said in a statement Thursday that Glen Doherty "lived his life to the fullest." Quigley spoke outside her mother's home in Woburn, north of Boston. She asked for privacy while the family grieved "our American hero."

Three Americans were killed at the consulate in Benghazi on Tuesday along with U.S. Ambassador Chris Stevens. The State Department has not publicly released all their names.

Quigley has said in media interviews that her 42-year-old brother was a former Navy SEAL who was worked for a private security company.

Family and friends, as well as Woburn's police chief and state Rep. James Dwyer of Woburn stopped by the home to offer condolences. Doherty grew up in nearby Winchester.