On Thursday night, the FBI tweeted a photo of the suspect and posted a reward of up to $50,000 "for information leading to the location, arrest, and conviction of the person(s) responsible for the placement of suspected pipe bombs in Washington, D.C. on January 6, 2021."
At around 1 p.m. on Wednesday, law enforcement agencies received reports of two suspected pipe bombs with wires outside the RNC and DNC headquarters in Washington, D.C.
ABC News then obtained an exclusive photo of the suspected explosive device found outside the RNC, which is located just a couple blocks away from the Capitol.
A federal law enforcement source told ABC News that the suspected pipe bombs were indeed active, and U.S. Capitol Police confirmed that the devices could have caused "great harm."
"The USCP Hazardous Materials Response Team determined that both devices were, in fact, hazardous and could cause great harm to public safety," police said in statement.
Bomb technicians used water cannons to blast the devices to break them apart and render them harmless just as violent pro-Trump protesters broke though police lines and stormed into the Capitol.
The Capitol siege left five people -- including one female protester who was shot by law enforcement officers and one police officer -- dead.
The FBI is is still seeking information on those involved in the siege, and on Thursday night tweeted photos of some of the pro-MAGA protesters, asking the public for help in identifying them.
ABC News' Jack Date contributed to this report.