Two college students have been charged with sexually attacking a woman on a crowded Florida beach with bystanders who apparently did nothing.

The Bay County Sheriff's Office said Friday that 22-year-old Delonte' Martistee and 23-year-old Ryan Austin Calhoun were arrested and charged with sexual battery by multiple perpetrators over an attack that occurred sometime between March 10-12. It was unclear Saturday whether they had attorneys.

The Panama City News Herald (http://bit.ly/1I3IqzB ) reports the attack went unreported even though it occurred around hundreds of witnesses during daylight.

Authorities learned of the attack when Troy, Alabama, police found a cellphone video of it while investigating a shooting.

Sheriff Frank McKeithen called the video the "most disgusting, sickening thing" he has ever seen. He said he expected more arrests.