Speaking at an event near the Maine-New Hampshire border, Biden called the terrorist group "barbarians." His reaction comes after IS militants beheaded American journalists James Foley and Steven Sotloff.
"[W]hen people harm Americans, we don't retreat. We don't forget," said Biden. "We take care of those who are grieving, and when that's finished, they should know, we will follow them to the gates of hell until they are brought to justice. Because hell is where they will reside. Hell is where they will reside."
"[T]hey somehow think that it's going to lessen U.S. resolve, frighten us, intimidate us. But, if they think the American people will be intimidated, they don't know us very well," he told the crowd.
Earlier Wednesday, U.S. President Barack Obama confirmed the authenticity of the video of Sotloff's murder and condemned the Islamic State. Speaking in Estonia, he called for the destruction of the group.
"Our objective is clear. That is to degrade and destroy (IS) so it's no longer a threat," he said. "We can accomplish that. It's going to take some time, it's going to take some effort."