A gang of masked gunmen broke into a beach bungalow and raped six Spanish women in Acapulco, a Mexican resort city heavily dependent on tourism revenue, officials said.
The attackers used phone cables and bikini straps to tie up seven Spanish men and a Mexican woman who were also in the rental house near the Barra Vieja beach as they assaulted the Spanish women for two hours early Monday.
The rental house is located in an area filled with restaurants and other bungalows off the beach in Acapulco, a popular vacation destination for foreign tourists in southern Mexico.
Acapulco Mayor Luis Walton Aburto caused a stir when he told reporters that the crime was "very unfortunate, but it happens everywhere in the world."
Mexico's foreign ministry however was quick to condemn the attacks, and said the Spaniards had received proper consular assistance.
The victims were taken to Mexico City, according to Mexican media.
La Jornada newspaper said the rapists took about $600 in cash, six cell phones, two computers, three cameras, a music player and two credit cards.
Acapulco has become one of Mexico's most violent cities amid growing confrontations between drug traffickers and security forces.
More than 70,000 deaths have been attributed to drug violence nationwide since December 2006, as rival cartels fight for control of lucrative drug routes to the United States.
But the violence usually does not affect the tens of millions of tourists who visit the city each year.