Federal authorities in Missouri charged two men with lying on forms to purchase guns ahead of the grand jury decision in the police shooting of Michael Brown.
Olajuwon Davis and Brandon Baldwin only faced those charges as of late Friday, but sources told ABC News that authorities were looking into whether they tried to acquire ready-made explosives and other weapons ahead of the decision, which is expected soon.
The two men are suspected of being associated with the New Black Panther party, said sources briefed on the arrests. The charges that were filed were intended to "take them out of the rotation," according to one source.
Neither man had a lawyer listed on court documents. The Drug Enforcement Administration and the Bureau of Alcohol, Tobacco, Firearms and Explosives played a part in the arrest.
This week, the FBI warned law enforcement agencies across the country that the decision “will likely” lead some extremist protesters to threaten and even attack police officers or federal agents.
“The announcement of the grand jury’s decision … will likely be exploited by some individuals to justify threats and attacks against law enforcement and critical infrastructure,” the FBI says in an intelligence bulletin issued in recent days. “This also poses a threat to those civilians engaged in lawful or otherwise constitutionally protected activities.”
The FBI has sent about 100 personnel to the St. Louis area to fill various roles and help other authorities address problems that could arise from the grand jury decision. Most of the FBI officials there will not be acting in an investigative capacity, sources told ABC News.
The FBI declined to comment on its operation in Ferguson.
St. Louis authorities said Friday that the grand jury was still meeting. The panel will decide whether to indict Ferguson Police Officer Darren Wilson for shooting Brown, who was unarmed, on Aug. 9.
Missouri Gov. Jay Nixon declared a state of emergency earlier this week and activated the Missouri National Guard to help keep order if necessary.
Michael Brown Sr., the father of the slain teen, issued a videotaped appeal this week for protester to remain peaceful whatever the verdict.
ABC News' Josh Margolin, Jack Date and Meghan Keneally contributed to this story.