Bills reporter Mike Rodak reports on the investigation into LeSean McCoy and how the Bills are reacting to the news. (1:25)

The Buffalo Bills and the NFL are investigating allegations made against LeSean McCoy by an unidentified woman on Instagram, claims which the star running back has denied.

An unidentified Instagram user posted a graphic image Tuesday morning of a woman, identified as the user's friend, with cuts and bruises on her face along with a message that accused McCoy of being responsible for the woman's injuries. The post, which has been deleted, also included allegations that McCoy beat his son, beat his dog and used "illegal steroids."

In response to inquiries from ESPN and ABC News into McCoy and the alleged victim, police in Milton, Georgia, released a statement saying they were investigating an early morning home invasion in the Atlanta suburb that sent an unidentified woman to a local hospital with unknown injuries. Police also said a second woman sustained a minor injury during the incident.

"The preliminary investigation indicates that this residence was specifically targeted by the suspect or suspects, and not a random incident," police said in the statement. "When officers arrived they found one victim who had been physically assaulted by a lone intruder. During the altercation, the suspect demanded specific items from the victim."

Police did not identify any suspect in what was termed an active investigation. Court records show that McCoy owns a home on the street of the incident as identified by police.

The unidentified Instagram user posted again Tuesday evening, writing the alleged victim's lawyer said to delete the original post. The user then added, "I stand by what I said. I've personally addressed [McCoy] on everything that was stated many many times over the years. Lie to these people if you want Shady, but you know I know everything."

Earlier Tuesday, a woman who called herself a friend of the victim posted to Facebook alleging there were "dudes" sent to the victim's house and she was pistol-whipped and robbed.

McCoy, who has been training in Miami this summer, released a statement Tuesday following the unidentified woman's Instagram post that denied the accusations.

A post shared by Lesean Mccoy (@shadymccoy) on Jul 10, 2018 at 9:16am PDT

The NFL said in a statement it was reviewing the matter. The Bills released a statement saying they were in contact with McCoy and the NFL and continued to gather information.

McCoy, a nine-year veteran, has never been suspended by the NFL. He was investigated for his involvement in an altercation with two off-duty police officers at a Philadelphia nightclub in 2016, but prosecutors did not press charges. In 2013, New Jersey State Police investigated an incident in which a woman said she was riding on a party bus with a group of people including McCoy, but was left at a service area. He faced a civil lawsuit in that case.

Information from Aaron Katersky of ABC News is included in this report.