A federal-level warning has been issued recommending that officers should take extra precaution and wear protective masks when handling suspected drug money, now more than ever.

The FBI terrorism unit is investigating a case that they took over from the Pennsylvania State Police who began investigating a bizarre criminal plot involving a virus, suspected drug money, and the Russian mob in Northeast Philadelphia.

The terrorism unit is trying to determine whether or not a virus was actually placed over money to protect the interest of the Russian mob.

In January, Pennsylvania State Troopers intercepted $250,000 during a routine traffic stop. The alleged drug money, which had been sealed in plastic, was being driven from Columbus, Ohio to Northeast Philadelphia.

According to law enforcement sources, after counting the seized cash, troopers began feeling ill and one trooper was even hospitalized with flu-like symptoms.

The cash counter revealed the presence of a toxin derived from the bacteria staphylococcus.

Dr. Joseph Smith, a local terrorism expert said it may be a new application of terrorism, although this time it was used as a deterrent among thieves: "I am not that surprised, this is the nature of terrorism. By its nature, you have to say we must always be mindful and careful of new applications."

However, FBI Spokesperson Jerri Williams said "this is under investigation and we have no information to provide to the public at this time."

While law enforcement says there are no known instances where the toxin has been used with malicious intent, Dr. Smith says he would not be surprised if criminals are now employing some of the same tools as terrorists: "This is one of the unique natures of terrorism. It’s different than your conventional type of warfare."