A spokesman for the Santa Clara Police Department said the department is fully aware of the incident and is investigating. The police say they are looking for information from the public.
Video posted on Facebook shows a man in an Adrian Peterson jersey on the pavement being kicked and punched. In the video, a handful of fans in 49ers gear appear to surround him. A security staffer then appears to attempt to break up the fight. Some of the people dressed in 49ers gear hit the man again before more help arrives.
The 49ers issued a statement Tuesday, saying: "We are aware of the disturbing incident following last night's game and are working in collaboration with the Santa Clara Police Department to investigate. The 49ers and our public safety partners have a steadfast commitment to ensuring a safe and enjoyable experience for all visitors to Levi's Stadium and unacceptable behavior such as this will not be tolerated."