Fifteen-year-old Ania was raped by several men as she was fetching water, one of hundreds of thousands of young victims of gang violence that has engulfed Haiti and turned children's lives into a "daily struggle for survival," UNICEF warned in a report Wednesday.

"A lot has happened in my life, if I weren't courageous, I wouldn't be here today," the girl, who had been displaced multiple times, told the U.N. children's agency.

An estimated 680,000 children have been displaced by gang violence in the crisis-wracked Caribbean country, nearly double the number from a year ago, UNICEF said, urging the international community to step up and help.