Atlanta, Georgia (CNN) -- The company whose bus was carrying dozens of Morehouse College students when it crashed in Georgia over the weekend did not have a permit to operate in the state, a state agency says.
The company, Superior Transportation Group, is "not licensed to operate in the state of Georgia," Bill Edge, spokesman for the Georgia Public Service Commission, told CNN.
The tour bus carrying 39 Morehouse College students -- including members of the marching band -- overturned Saturday on an interstate highway south of Atlanta, resulting in at least four non-life-threatening injuries, according to a school official.
Superior Transportation Group is not on a list of licensed transportation companies available on the Public Service Commission's Web site, Edge said. According to the Web site, the company had one complaint on file for 2008.
The commission had "sent [the company] a notice to cease and desist because [the commission] found they were operating illegally," Edge said. The commission never heard back from the company, he said.
The bus that crashed was one of three traveling in a convoy to a football game in Albany, Georgia.
Area police said a vehicle may have cut in front of one of the buses, causing the driver to lose control.
Video showed the battered bus on its side in grass about 50 feet off the highway.
CNN's Carolina Sanchez contributed to this report.