Mass rape video shocks Brazil as teen girl drugged, gang-raped by over 30 men in Rio

Rio de Janerio: Brazilian police on Saturday were investigating the gang-rape of a 16-year-old girl whose attackers boasted about it by posting an online video of her that has horrified the country.

Online social networks erupted with outrage over the video posted on Wednesday featuring the girl naked on a bed and the apparent rapists bragging that she had been raped by more than 30 men.

They are suspected of assaulting her on May 21 in Rio de Janeiro, a city stricken by violent crime that will host the Olympic Games in August.

"There are strong indications that the young woman was raped," Rio police chief Fernando Veloso told a news conference.

"We cannot say whether there were 30 attackers, 33 or 36. The investigations will determine that," he said.

Police have identified four of the men suspected of taking a "direct or indirect" part in the rape or the posting of the video, he added.

Brazil's acting president Michel Temer and other senior figures reacted with outrage.

"I condemn most forcefully the rape of the teenager in Rio de Janeiro," he wrote on Twitter.

"It is absurd that in the 21st century we should have to live with barbaric crimes such as this."

The authorities are working "to find those responsible and rigorously punish the authors of this rape and the publishing of this criminal act on social networks," he said.

The UN women's rights agency condemned the case along with another recent alleged gang-rape of a 17-year-old girl in the northeastern state of Piaui.

"Apart from the fact that these are young women, these barbaric cases are similar in that the teenagers were lured by their attackers in premeditated plots," UN Women in Brazil spokeswoman Nadine Gasman said on Thursday.

"They were violently attacked in a context of illegal drug use."

Brazilian police recorded a sexual assault in the country every 11 minutes in 2014, the Brazilian non-governmental organization Public Safety Forum said in a study, estimating that half a million such assaults take place overall each year.