Law enforcement "taking no chances" on September 18 rally at U.S. Capitol

Federal, state and local law enforcement remain on high alert ahead of Saturday's "Justice for J6" protest outside of the U.S. Capitol. 

Although intelligence suggests there will not be widespread or significant violence, federal law enforcement officials and groups that track domestic extremism told CBS News they remain concerned about the potential for "lone wolf"-style violence or individual "knuckleheads" using the gathering to cause trouble.

The FBI is monitoring chatter picked up on social media sites and message boards, including Telegram, Parler and Gab.