Seattle Seahawks running back Marshawn Lynch's behaviour is again being criticized after he allegedly threatened a 13-year-old boy who was just asking for his autograph in Wisconsin last Saturday.

TMZ revealed in an exclusive report that the uncle of the boy, Dave Medina, claimed that Lynch told the former that he will "slap the smile" off his face.

However, it said that the allegation was not caught on tape though there were a lot of witnesses who can attest that the incident indeed happened.

According to TMZ, Lynch was on his way out of a hotel when young boys approached him to ask for his signature. In a video, which already circulated on the web, Lynch can be seen telling a group of young boys to back off him.

Medina added that Lynch was even worse when the cameras were not recording his moves.

"He told my nephew, 'How would you like it if I slapped that f**king phone out of your hand and that smile off your face,'" the uncle told TMZ Sports.

Medina noted that he could not believe his ears and eyes for seeing who Lynch really was.

We know that Lynch is a beast on the field as per SB Nation, but the public is not aware that he carries such attitude even outside.

These kinds of issues are not anymore new for the running back as he had been falsely accused with assault a year ago.

The Seattle Times earlier reported that the Belleuve Police Department investigated an assault case which took place on the afternoon of August 10, 2014 with a woman alleging that Lynch was the suspect.

However, NBC Sports said that Lynch, at that time, was only falsely accused after the police confirmed that the NFL player had no involvement on the case.

It added that the accuser could face charges for "making a false or misleading statement to a public servant" which is reportedly has a jail time of 364 days and a fine of $5,000.

Kiro TV said the Seahawks released a statement saying they were confident of Lynch's innocence.

"While we maintain the utmost respect for the investigative process, after speaking with Marshawn, we are comfortable these accusations are bogus," the team statement further read.

The incident also did not change anything on Lynch's participation in the team but will this latest threat incident move his team to act on the matter.

Lynch nor the Seahawks has not given any comments to the incident as of this writing.