[Updated at 12:20 p.m. ET] Marcos Juarez, the principal investigator for the prosecutor of Guerrero state and lead investigator on the case, says investigators know the identities of the men described as perpetrators, and that some if not all of them are under surveillance.

[Posted at 9:37 a.m. ET] Mexican authorities have strong leads in the investigation of the rape of six Spanish tourists in Acapulco, and arrests could be made as early as this week, a government official with knowledge of the case told CNN today.

Masked gunmen broke into a beach bungalow on the outskirts of Acapulco and raped six women tourists after tying up a group of men with cell phone cables and bikini straps, officials said Tuesday.

The victims are Spanish nationals, ranging in age from 20 to 34, Mexican authorities said.