Brazilian women, desperate to win Prince Harry's hand in marriage, are expected to mob the young royal upon his visit to Brazil.
According to dailystar.co.uk, the security personnel fear a mob as the girls have been awaiting his visit for months.
Fabiana Silva, 19, said: "Many women here would love Prince Harry to make them his princess. I’d be lying if I said I wasn’t one of them."
The 27-year-old prince is visiting Brazil to launch the GREAT campaign to promote Britain ahead of the Olympics.
The festivities kicked off Friday on the top of Rio’s Sugarloaf Mountain with samba dancing and martial arts presentations.
A fund-raising polo match will follow in aid of Harry’s African charity Sentebale, which helps children in Lesotho.
Harry had travelled from Jamaica, the final stop on the tour in honour of the Queen’s Diamond Jubilee.