Rogelio Campuzano, 34, in front of his home where his brother, Santiago, was tied up, beaten and robbed early Wednesday. View Full Caption DNAinfo/Mina Bloom

LOGAN SQUARE — The brother of the 40-year-old man who was tied up, beaten and robbed during an early Wednesday home invasion said his brother's attackers are "probably" in gangs, but his brother doesn't have any gang affiliations.

Rogelio Campuzano, 34, was on a family trip in the Wisconsin Dells with his wife and three children when he got the call that his brother, Santiago, had been attacked in their home in the 2700 block of North Hamlin Avenue.

"We're in shock," Rogelio Campuzano said on his porch as a worker changed the locks on his front door Wednesday afternoon.

Just before 2 a.m. Wednesday, the attackers — three men and one woman — broke into the apartment and then proceeded to tie up Santiago Campuzano's hands and feet and hit him in the head with a baseball bat before ransacking the apartment, according to Rogelio Campuzano. They came away with $260 and the house keys, he said.

"My brother was on the floor, bleeding. I was so worried," Rogelio Campuzano said.

Santiago Campuzano was taken to St. Mary's Hospital, where he was treated and released, according to police. Rogelio Campuzano rushed home to make sure his brother was OK, cutting his family trip short by a day.

It's unclear why the attack occurred.

Rogelio Campuzano said he couldn't give an explanation, partially because they've been so busy rushing back from Wisconsin and getting his brother home from the hospital that they haven't had a chance to speak with him directly about it.

Though Rogelio Campuzano suspects the attackers are "probably" gang members, he said his brother leads a quiet life and isn't affiliated with any gangs. In the seven years that they've lived in the Logan Square apartment, they've never "had problems with anyone," he said.

"He's good. He's working. He never goes out or even drinks. He [doesn't] have too many friends. Just friends from work and me and my wife," Rogelio Campuzano said of his brother.

A Chicago Police spokeswoman couldn't say whether or not the incident was gang related.

Rogelio Campuzano said his brother is recovering from the incident, but described him as "doing OK."

No one is in custody. An investigation is ongoing.