GRESHAM, Ore. -- A local high school sent some students home for having shaved lines in their eyebrows, something that police say is gang-related.

Four boys were sent home from Centennial High School in Gresham because their partially shaved eyebrows were seen as a signal of gang affiliation.

The principal at Centennial High said the policy is being reviewed, but two of the boys remain out of school.

The shaving of eyebrows is a look sported by some hip-hop artists and, lately, among some Latino gang members in the Gresham area. That’s what concerns staff at Centennial High School.

The four students were told last week to cover up their shaved brows with makeup, or remove the entire eyebrow and start growing new ones, otherwise they could not return.

Jasiel Carmona went back to school Monday. He said his look was not about gangs, but an image he liked.

Ultimately, he decided that the brows he’s now colored in with eyebrow pencil aren’t worth being left out of school.

Classmates said they thought the school was overreacting.

“I think it's silly to send them home. I also think it's silly to shave your eyebrows. It's just a fad that'll pass,” Centennial student Gary Lohkamp said.

A school resource officer from the Gresham Police Department advised that one line shaved in one brow, and three cut into the other one has been adopted by a local Latino gang as representing 13, the gang’s symbol.

“I only have two and one. I don't know why the teacher told me you're out, ‘cause you're gang or something like that,” Carmona said.

The message from officers went out Thursday. One student came back to school the next day with the eyebrow fixed. Carmona returned Monday morning.

“What the gang task force identified is the one three. Our response, and we’re now re-evaluating that, was to attempt to deal with any student who was putting slashes of any kind in their eyebrows,” Centennial Principal Mark Baier said.

The principal at Centennial said he and his staff are consulting with other schools to see what kind of eyebrow policy they’re enforcing.

Centennial may decide to allow students with lines shaved in their eyebrows to come back to school as long as they don’t have the gang-affiliated one three.

“I don't understand because in my country it's good. I don't know about the people here,” Carmona said.