Security at the Queen Theatre in Wilmington, Del. where U.S. president-elect Joe Biden has been holding meetings and making statements, appeared to be bulked up on Sunday, days after the deadly violence in the U.S. Capitol and as Washington prepares for Biden's inauguration later this month.

Several heavily-armed military or law enforcement personnel were seen exiting the theatre before Biden's departure in the afternoon, and a dump truck was parked near Biden's vehicle just outside the theatre.

The security level appeared to be heavier than just a few days earlier, according to several Reuters journalists.

U.S. Senate Minority Leader Chuck Schumer, a Democrat, said on Sunday that the threat from violent extremist groups remains high after the deadly storming of the U.S. Capitol on Wednesday by supporters of President Donald Trump