Complaints about alleged race discrimination by a Chicago bar against six black Washington University students have prompted state and federal investigations and a likely lawsuit to be filed by the students against the bar.

The developments came in the week after the incident, which occurred during a senior class trip night out at the Original Mothers bar in a popular nightspot downtown. Senior Class Council had made prior arrangements with the bar for some 200 seniors to go there.

The investigations, which include an FBI inquiry, are a result of complaints filed by Regis Murayi, one of the students denied entry into the bar on Oct. 17. Murayi, treasurer of Senior Class Council, filed complaints with the Chicago Commission on Human Rights, the Illinois attorney general’s office and the U.S. Department of Justice.

In the complaints, Murayi alleged that the bar’s refusal to admit the students constituted discrimination under the Chicago Municipal Code, which prohibits places of public accommodations from discriminating against clientele based on race. Race discrimination is also a federal offense under Title II of the 1964 Civil Rights Act.

Murayi said the manager of Mothers told him and the other students that they could not enter the bar because they were violating the bar’s ban on baggy jeans. But Murayi said the manager admitted white students wearing baggy jeans. To prove this, Murayi changed jeans with senior Jordan Roberts, a white student, and Roberts was then admitted into the bar wearing the jeans.

Murayi said he thinks the six were discriminated against not because of their jeans but because they were a large group of black men.

“The bar racially discriminated against us and automatically assumed that we were dangerous,” Murayi said.

Representatives from Mothers declined to be interviewed this weekend by Student Life but said in a news release that the bar “does not discriminate against guests or patrons on the basis of race, and would never tolerate discriminatory conduct.” Mothers said it is conducting an investigation into the case and will take disciplinary action if necessary.