From a report at the link below:
Federal drug enforcement agents showed up unannounced Sunday to check at least three visiting NFL teams' medical staffs as part of an investigation into former players' claims that teams mishandled prescription drugs.
No arrests were made after the raids. Other teams may be checked later in the day.
The San Francisco 49ers' staff was checked at MetLife Stadium in East Rutherford, New Jersey, after they played the New York Giants. The Tampa Bay Buccaneers' staff was checked at Baltimore-Washington International airport after playing the Redskins. The Seattle Seahawks, who played at Kansas City, confirmed via the team's Twitter account that they were spot-checked as well.
Full report here.