A 15-year-old boy was brought into custody last month for allegedly plotting to launch an ISIS-inspired attack on Pope Francis during his scheduled trip to the United States next week.

ABC News learned on Monday that the teenager was arrested by federal authorities outside of Philadelphia in August. Officials say that the unidentified teen was radicalized by ISIS ideology through social media and that he used the Internet to learn how to make a bomb.

"The minor was inspired by [ISIS] and sought to conduct a detailed homeland attack which included multiple attackers, firearms, and multiple explosives, targeting a foreign dignitary at a high-profile event," reads a joint intelligence bulletin by the FBI and Department of Homeland Security that was issued to law enforcement across the country on Aug. 14.

The "foreign dignitary" mentioned in the bulletin is the pope, who is set to arrive to the U.S. on Sept. 22.

"The minor obtained explosives instructions and further disseminated these instructions through social media," stated the joint intelligence bulletin.

Although the incident was kept under wraps, U.S. Rep. Mike McCaul, R-Texas, mentioned the threat during an interview on ABC's "This Week" on Sunday.

"We are monitoring very closely threats against the pope as he comes into the United States," McCaul said on the show. "We have disrupted one particular case" involving a plot against the Pope, added the chairman of the House Homeland Security Committee.

The suspect now faces charges for allegedly attempting to provide material support to a terrorist organization and attempting to provide material support to terrorist activity. However, a law enforcement source confirmed to Fox News that the boy's plans were aspirational rather than operational. The teen's mental health has also been called into question.

Officials announced that there is no other specific or credible threat to the pope for his visit to the United States.

"The FBI is working closely with the United States Secret Service and our federal, state and local partners in advance of the papal visit to ensure the safety and security of all," a spokeswoman for the FBI's field office in Philadelphia said in a statement.