FORT LAUDERDALE, Fla. -- The man who is supervising the medical treatment of two homeless men who were attacked spoke out Friday as police continue to search for the men who attacked them and killed a third man.

Two to four men armed with bats attacked three homeless men at three different sites Thursday morning. No arrests have been made in the case.

Warning: Contains graphic images, video
Images: Surveillance Video Shows Attack
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One of the men, Norris Gaynor, died from his injuries. Two others survived and are being treated at Broward General Medical Center.

"This is tragic. It's humanity at its worst, and it's hard to believe," said Dr. Nabil Elsanadi, of Broward General Medical Center. "They're easier targets because they don't have a shelter. They don't have someplace to live. If you have, and this is my big fear, in the community there may be a ritual gang, something where there are people out there to prove themselves, as far as passage rites or to belong to the gang they would have to do something like that. So, I'm worried. I'm concerned for our community."

One of the two men who survived the attacks, Raymond Perez, authorized nurses to speak for him.

"He is actually very emotional about the whole situation. He wanted to speak himself, but he just was not feeling well this afternoon. What he really requested that we share with everyone is that this type of abuse of an individual should never be sanctioned. It should never be permitted," said Suzette Tyler-Ball, the trauma manager.

The two men are expected to be released from the hospital within the next few days.

Park Ranger Ismael Trilo said his heart sank when he watched on TV a man he called his friends being beaten by bats on FAU's downtown campus.

"He's very quiet. He's always very polite to the people," Trilo said.

Efforts to protect the homeless outside the hospital are also under way in Broward County.

Steve Werthman, of the Broward Homeless Initiative, said he is trying to make sure that the homeless outreach programs are increasing right now.

"We've seen random acts of violence before, but nothing this organized. I've been working in this since the mid-80s and we haven't seen anything like this," Werthman said.

The Salvation is opening emergency shelters. The Guardian Angels are also helping to patrol the streets, along with Fort Lauderdale police.

The Homeless Voice organization is also passing out used cell phones for homeless people to use.

Police said they are following up on tips received from the public.

On Friday night, a woman who identified herself only has "Erin" said she called Fort Lauderdale police after her son and his friends recognized the men on the videotape as former schoolmates at South Plantation High School.

"(My son said) 'We go to school with those kids. We know those kids from the neighborhood. They brag about how they beat up homeless people all the time,'" Erin said. "The detective asked me the names that I had, and when I told him, he said, 'Yeah.' He, like, agreed with me."

She said detectives were already questioning the two.

Anyone with information is asked to call Crime Stoppers at (954) 493-TIPS.