Suspended Miami Dolphins guard Richie Incognito and at least one other Dolphins player mocked the ethnic background of a team staff member and made crude jokes about the man's wife, according to a report in the National Football Post.

Sources tell ESPN that both the NFL and the Dolphins are aware of the allegations.

Richie Incognito and at least one other Dolphins player mocked the ethnic background of a team staff member, according to a report. Tom Szczerbowski/Getty Images

According to the report, Incognito would sometimes dress in garb from the staff member's culture and make profane jokes about that culture, making the staff member uncomfortable.

A Dolphins spokesman did not immediately respond to the Post's request for comment.

This is the latest unflattering news to surface about Incognito, who was suspended indefinitely by the Dolphins on Nov. 3 for conduct detrimental to the team amid accusations he bullied and used racially charged terms against fellow lineman Jonathan Martin.

The NFL is investigating whether Incognito harassed or bullied Martin and whether their teammates and the organization mishandled the situation. This week, Dolphins players are meeting with NFL investigators regarding the bullying scandal.

Incognito has filed a non-football injury grievance against the club, challenging his status as indefinitely suspended for conduct detrimental to the team. On Monday, the Dolphins requested a delay for Incognito's grievance hearing, which is scheduled for Thursday, according to sources.

Also, a Washington lawyer retained by the NFLPA is launching a separate investigation into issues of workplace safety with the Dolphins, a person with knowledge of the situation told USA Today Sports on Tuesday.

According to the report, Richard Smith -- the NFLPA's lead outside counsel during the New Orleans Saints bounty investigation --- intends to interview witnesses and examine team management's role in alleged abuse that led to Martin's departure from the Dolphins.

Information from ESPN Senior NFL Insider Chris Mortensen was used in this report.