A Penn State sorority is being investigated after a racist photo of the girls posing during a Mexican-themed party was posted on the Internet, according to the independent Penn State blog, Onward State.

The photo of the girls was posted on Tumblr and Facebook, so Onward State was able to identity the girls as members from the Chi Omega sorority campus through the tags in the pictures.

The picture was allegedly taken around Halloween, and the girls were shown posing with fake mustaches and sombreros.

Two of the girls at the bottom of the picture were holding signs that said, "Will mow lawn for weed + beer" and "I don't cut grass I smoke it."

The president of the Nu Gamma chapter of Chi Omega, Jessica Riccardi, confirmed to the student publication, the Daily Collegian, that the sorority was being investigated because of the racist photo and she also issued an apology.

"Our chapter of Chi Omega sincerely apologizes for portraying inappropriate and untrue stereotypes. The picture in question does not support any of Chi Omega's values or reflect what the organization aspires to be,” Riccardi said.

The Penn State Panhellenic Council executive board also issued a statement to the Daily Collegian:

"We are addressing the situation immediately with the members of the chapter in conjunction with their national headquarters."

"This photo has been brought to our attention and we have looked into the issue," Lisa Powers, Director of Penn State's Public Information, released a statement to Yahoo News.

"The students in the photo are within their First Amendment rights to express themselves in this way, although we are certainly appalled that they would display this level of insensitivity and lack of judgment,” she said.

Powers also added, "These costumes and this group do not represent fraternity and sorority life at Penn State, nor the 95,000 students who attend our University. The Chi Omega sorority sisters have expressed deep remorse over this incident."